Fifth Avenue Bank of New York (1915). Fifth Avenue ... Walton Advertising and Prtg. Company. p. 26. Archived from the original on September 27, 2021. Retrieved September 26, 2021.
"A Big Realty and Building Combination". The Real Estate Record: Real estate record and builders' guide. Vol. 67, no. 1724. March 30, 1901. p. 545. Archived from the original on September 2, 2022. Retrieved September 2, 2022 – via columbia.edu.
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Goldberger 1981, p. 38 note 3: Andrew S. Dolkart. "The Architecture and Development of New York City: The Birth of the Skyscraper – Romantic Symbols", Columbia University, accessed May 15, 2007. "It is at a triangular site where Broadway and Fifth Avenue—the two most important streets of New York—meet at Madison Square, and because of the juxtaposition of the streets and the park across the street, there was a wind-tunnel effect here. In the early twentieth century, men would hang out on the corner here on Twenty-third Street and watch the wind blowing women's dresses up so that they could catch a little bit of ankle. This entered into popular culture and there are hundreds of postcards and illustrations of women with their dresses blowing up in front of the Flatiron Building. And it supposedly is where the slang expression '23 skidoo' comes from because the police would come and give the voyeurs the 23 skidoo to tell them to get out of the area." Goldberger, Paul (1981). The skyscraper. New York: Knopf Distributed by Random House. ISBN978-0-394-71586-5. OCLC7653455.
"Glimpses From the Metropolis". Democrat and Chronicle. August 9, 1902. p. 7. Archived from the original on September 4, 2022. Retrieved September 4, 2022.
"Big Real Estate Deal". Wilkes-Barre Semi-Weekly Record. May 9, 1899. p. 6. Retrieved September 7, 2022.
"To Improve 'Eno's Flatiron'". The Standard Union. November 26, 1900. p. 2. Archived from the original on September 4, 2022. Retrieved September 4, 2022.
Pitts, Carolyn (February 9, 1989). "Flatiron Building". National Register of Historic Places Registration. National Park Service. Archived from the original on June 5, 2020. Retrieved March 10, 2016.
"Flatiron Building". National Historic Landmark summary listing. National Park Service. September 12, 2007. Archived from the original on March 14, 2013. Retrieved September 13, 2007.
Lowe, David (March 15, 1979). "Design Notebook". The New York Times. ISSN0362-4331. Archived from the original on September 7, 2022. Retrieved September 6, 2022.
Slobin, Sarah (March 23, 1997). "F.y.i."The New York Times. ISSN0362-4331. Archived from the original on December 28, 2017. Retrieved September 7, 2022.
"Queer Shaped Buildings Plentiful in New York: Structures Erected to Con- Form With Twisting Streets Present Odd Sights. Sky Line of Art". The Washington Post. August 29, 1926. p. M10. ISSN0190-8286. ProQuest149624003.
Sherman, Beth (January 10, 1991). "Ladies Mile a Great Place to Shop. A Great Place to Eat. And Now, A Great Place to Live". Newsday. p. 81. ProQuest278311617.
"Russia Opens a Bureau: Will Make Munition Contracts Direct Instead of by Brokers. Suite of Offices in Flatiron Building Takes Up Three Floors". The Washington Post. August 22, 1915. p. R7. ISSN0190-8286. ProQuest145402768.
Adams, F Ellison (April 6, 1924). "When the White Light Wheels Go Round". The New York Herald, New York Tribune. p. SMA7. ProQuest1113591589.
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"Flatiron Building in Roman Britain: Temple of Triangular Design Is Uncovered on Site of Verulamium". The New York Times. October 15, 1933. p. RE7. ISSN0362-4331. ProQuest100859556.
"New-York Has Many Impressive Skyscrapers but None More Remarkable Than the Flatiron". New-York Tribune. June 29, 1902. p. B3. ProQuest571209603.
"40 Floors Will Top Old Church Site on Madison Av. Corner: Building Will Be Built Over Bank of Six-Story Shops; Art Trade Is Favored". New York Herald Tribune. December 2, 1928. p. D2. ProQuest1113697170.
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"Foreclosure Suit Is Filed Against Flatiron Building". New York Herald Tribune. March 2, 1933. p. 25. ISSN1941-0646. ProQuest1240053932.
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"Flatiron Building Gets New Tenants: Modernization Work in Fifth Avenue Landmark Aids Renting Activity". The New York Times. May 4, 1941. p. RE1. ISSN0362-4331. ProQuest106080005.
Bird, Robert S. (March 22, 1944). "Flatiron Building Strike Halts Elevators, Cuts Off Heat, Light". New York Herald Tribune. p. 16. ISSN1941-0646. ProQuest1269899978.
"Building Firm Buys Leasehold On West 42d St.: Thompson-Starrett Closes $8,250,000 Deal for Woolworth Store Sites". New York Herald Tribune. October 26, 1945. p. 33. ISSN1941-0646. ProQuest1322153396.
Moss, Linda (November 16, 1987). "St. Martin's Pens a New Tale: Hefty Bids Yield Best Sellers". Crain's New York Business. Vol. 3, no. 46. p. 3. ProQuest219112033.
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"Fire Damages a Floor Of the Flatiron Building". The New York Times. May 6, 1972. p. 38. ISSN0362-4331. ProQuest119565047.
Sommerfield, Frank (May 23, 1988). "The Inevitable Fall". Crain's New York Business. Vol. 4, no. 21. p. 27. ProQuest219116848.
Moin, David (May 9, 1990). "C.P. Company Store Set For New York". Women's Wear Daily. Vol. 159, no. 91. p. 4. ProQuest1445703956.
"Flatiron Building Gets Renovation and a New Tenant". The New York Times. February 21, 1991. p. C.6. ISSN0362-4331. ProQuest427965333.
Scaduto, Anthony; Vaughan, Doug; Stasi, Linda (February 20, 1991). "Inside New York". Newsday. p. 11. ProQuest278357531.
Socha, Miles (August 22, 1996). "C.P To Shut Flatiron Flagship, Reopen In Different NY Site". Women's Wear Daily. Vol. 172, no. 37. p. 12. ProQuest1445761879.
Feldman, Amy (January 20, 1997). "Leona Closes in on Big Sale". Crain's New York Business. Vol. 13, no. 3. p. 1. ProQuest219188351.
"Famous Flatiron Building Observes 50th Birthday". The Austin Statesman. July 14, 1952. p. 10. ProQuest1559453449.
"Corydon Purdy Dies; Developed The Skyscraper: Designed Flatiron Building Metropolitan Life Tower 'Times' Building, Other". New York Herald Tribune. December 28, 1944. p. 10A. ISSN1941-0646. ProQuest1284471762.
"In This Partly Civilized Age and City...". Life. Vol. 37, no. 972. June 20, 1901. p. 522. ProQuest90679259.
Zimmermann, Karl (April 26, 1987). "Looking Up: Skyscrapers on Tour". The Washington Post. p. E01. ISSN0190-8286. ProQuest306881699.
"Signs Multiply That the Steel-Skeleton Construction...". The American Architect and Building News. Vol. 82, no. 1450. October 10, 1903. p. 10. ProQuest124650174.
Murphy, Joan (January 19, 2001). "Nicknames Tell City Tales". USA TODAY. p. C.4. ProQuest408891920.
"May Have to Lower Flatiron Building". San Francisco Chronicle. February 9, 1903. p. 1. ProQuest573232041.
"8-Sided Buildings Pose Space Tests: Office Designers Try to Turn Odd Shapes Into Assets Odd-Shaped Buildings Avoided Stereotypes". The New York Times. May 20, 1962. p. R8. ISSN0362-4331. ProQuest116059649.
Fowler, Glenn (September 22, 1968). "Odd-Shaped Plots Foster Ingenuity in Design". The New York Times. p. 418. ISSN0362-4331. ProQuest118225821.
Pitts, Carolyn (February 9, 1989). "Flatiron Building". National Register of Historic Places Registration. National Park Service. Archived from the original on June 5, 2020. Retrieved March 10, 2016.
"Flatiron Building". National Historic Landmark summary listing. National Park Service. September 12, 2007. Archived from the original on March 14, 2013. Retrieved September 13, 2007.
Fifth Avenue Bank of New York (1915). Fifth Avenue ... Walton Advertising and Prtg. Company. p. 26. Archived from the original on September 27, 2021. Retrieved September 26, 2021.
"Glimpses From the Metropolis". Democrat and Chronicle. August 9, 1902. p. 7. Archived from the original on September 4, 2022. Retrieved September 4, 2022.
"To Improve 'Eno's Flatiron'". The Standard Union. November 26, 1900. p. 2. Archived from the original on September 4, 2022. Retrieved September 4, 2022.
"A Big Realty and Building Combination". The Real Estate Record: Real estate record and builders' guide. Vol. 67, no. 1724. March 30, 1901. p. 545. Archived from the original on September 2, 2022. Retrieved September 2, 2022 – via columbia.edu.
"Building Notes". The Real Estate Record: Real estate record and builders' guide. Vol. 75, no. 1932. March 25, 1905. p. 532. Archived from the original on September 5, 2022. Retrieved September 5, 2022 – via columbia.edu.
Lowe, David (March 15, 1979). "Design Notebook". The New York Times. ISSN0362-4331. Archived from the original on September 7, 2022. Retrieved September 6, 2022.
Slobin, Sarah (March 23, 1997). "F.y.i."The New York Times. ISSN0362-4331. Archived from the original on December 28, 2017. Retrieved September 7, 2022.
Goldberger 1981, p. 38 note 3: Andrew S. Dolkart. "The Architecture and Development of New York City: The Birth of the Skyscraper – Romantic Symbols", Columbia University, accessed May 15, 2007. "It is at a triangular site where Broadway and Fifth Avenue—the two most important streets of New York—meet at Madison Square, and because of the juxtaposition of the streets and the park across the street, there was a wind-tunnel effect here. In the early twentieth century, men would hang out on the corner here on Twenty-third Street and watch the wind blowing women's dresses up so that they could catch a little bit of ankle. This entered into popular culture and there are hundreds of postcards and illustrations of women with their dresses blowing up in front of the Flatiron Building. And it supposedly is where the slang expression '23 skidoo' comes from because the police would come and give the voyeurs the 23 skidoo to tell them to get out of the area." Goldberger, Paul (1981). The skyscraper. New York: Knopf Distributed by Random House. ISBN978-0-394-71586-5. OCLC7653455.
"Queer Shaped Buildings Plentiful in New York: Structures Erected to Con- Form With Twisting Streets Present Odd Sights. Sky Line of Art". The Washington Post. August 29, 1926. p. M10. ISSN0190-8286. ProQuest149624003.
"Russia Opens a Bureau: Will Make Munition Contracts Direct Instead of by Brokers. Suite of Offices in Flatiron Building Takes Up Three Floors". The Washington Post. August 22, 1915. p. R7. ISSN0190-8286. ProQuest145402768.
"On New York's Avenue of Light: Electric Signs Represent Millions in Lamps and Dollars. A Contrast of 30 Years First Big One Cost $200, And Now One Firm Pays $600,000 Annually for Space". The New York Times. October 10, 1926. p. RE9. ISSN0362-4331. ProQuest103888563.
"Flatiron Building in Roman Britain: Temple of Triangular Design Is Uncovered on Site of Verulamium". The New York Times. October 15, 1933. p. RE7. ISSN0362-4331. ProQuest100859556.
"Real Estate News: Flatiron Tower Changes Hands In Foreclosure Equitable Life Purchases Old Broadway Landmark With Bid of $100,000". New York Herald Tribune. July 1, 1933. p. 25. ISSN1941-0646. ProQuest1242840608.
"Flatiron Building Gets New Tenants: Modernization Work in Fifth Avenue Landmark Aids Renting Activity". The New York Times. May 4, 1941. p. RE1. ISSN0362-4331. ProQuest106080005.
Bird, Robert S. (March 22, 1944). "Flatiron Building Strike Halts Elevators, Cuts Off Heat, Light". New York Herald Tribune. p. 16. ISSN1941-0646. ProQuest1269899978.
"Building Firm Buys Leasehold On West 42d St.: Thompson-Starrett Closes $8,250,000 Deal for Woolworth Store Sites". New York Herald Tribune. October 26, 1945. p. 33. ISSN1941-0646. ProQuest1322153396.
"Corydon Purdy Dies; Developed The Skyscraper: Designed Flatiron Building Metropolitan Life Tower 'Times' Building, Other". New York Herald Tribune. December 28, 1944. p. 10A. ISSN1941-0646. ProQuest1284471762.
Zimmermann, Karl (April 26, 1987). "Looking Up: Skyscrapers on Tour". The Washington Post. p. E01. ISSN0190-8286. ProQuest306881699.
Lowe, David (March 15, 1979). "Design Notebook". The New York Times. ISSN0362-4331. Archived from the original on September 7, 2022. Retrieved September 6, 2022.
Slobin, Sarah (March 23, 1997). "F.y.i."The New York Times. ISSN0362-4331. Archived from the original on December 28, 2017. Retrieved September 7, 2022.
"8-Sided Buildings Pose Space Tests: Office Designers Try to Turn Odd Shapes Into Assets Odd-Shaped Buildings Avoided Stereotypes". The New York Times. May 20, 1962. p. R8. ISSN0362-4331. ProQuest116059649.
Fowler, Glenn (September 22, 1968). "Odd-Shaped Plots Foster Ingenuity in Design". The New York Times. p. 418. ISSN0362-4331. ProQuest118225821.