"Inter. Combustion in Fine New Home". The Philadelphia Inquirer. January 30, 1927. p. 6. Archived from the original on April 20, 2022. Retrieved April 20, 2022 – via newspapers.com.
"J. P. Morgan's Surrender at Last Explained: Real Estate News Plans Filed Yesterday for 26-Story Building on Astor Block on Madison Ave. Show Part Apartments". New York Herald Tribune. March 19, 1925. p. 27. ProQuest1112902226.
"Texas Realty Owner Has Had Success In New York Field: Jesse Jones, Who Controls Houston Properties Corporation, Came Here From Houston Some 2 Years Ago". New York Herald Tribune. June 27, 1926. p. C2. ProQuest1112585824.
Crane, Frank W. (September 14, 1941). "Murray Hill Foreclosure Recalls Astor's Fight to End Trade Ban: Zoning Restrictions on Madison Ave. Site Were Lifted After His Death, When Estate Sold Property for Present Building". The New York Times. p. RE1. ISSN0362-4331. ProQuest105614629.
"3 Workmen Die In Madison Av. Scaffold Crash: Collapse Hurls Trio From Ninth Floor of 25-Story Building Being Erected Over Residents' Protest; Fourth Leaps to Safety Grasps Wire as He Starts to Slip and Awaits Rescue; Guilders Cleared of Blame". New York Herald Tribune. October 15, 1925. p. 21. ProQuest1112930046.
"Three Midtown Business Firms Expand Madison Ave. Offices". New York Herald Tribune. October 29, 1950. p. 1C. ProQuest1325300526.
"Realty News: Plans Filed For New Madison Avenue Structure: More Garment Firms Take Spacc". Women's Wear. Vol. 30, no. 65. March 19, 1925. pp. 50, 55. ProQuest1676922080.
"Warner Bros. Modern Newly Redecorated N. Y. Offices Ready: Unique Convertible Booths Utilized - Showroom Spacious and Luxurious". Women's Wear Daily. Vol. 75, no. 81. October 23, 1947. p. 43. ProQuest1627372819.
"Corsets: New Venus Showroom In Smart Setting". Women's Wear Daily. Vol. 76, no. 113. June 10, 1948. p. 58. ProQuest1862269286.
"New Silk Trade Centre Forming at Madison Ave. and 34th Street". The New York Times. November 23, 1924. p. RE1. ISSN0362-4331. ProQuest103224844.
"Estimate Board Bars Astor Business Block: Reverses Action of Standards and Appeals Board, but Its Authority Is Disputed". New-York Tribune. May 4, 1918. p. 10. ProQuest575924783.
"Astors Lose Fight Against Murray Hill: Appellate Division Refuses to Allow Business Improvement on Madison Avenue Block Front". New-York Tribune. February 25, 1922. p. 15. ProQuest576556287.
"Morgan Loses Fight for Murray Hill Residents: Astor Estate May Erect Business Building, Court of Appeals Decider". New-York Tribune. January 18, 1923. p. 1. ProQuest1221765005.
"Newspaper Specials: Exclusive Dispatches in New York, Chicago, Philadel- phia, Detroit and Boston Papers". Wall Street Journal. December 18, 1924. p. 13. ISSN0099-9660. ProQuest130225757.
"25-Story Office Building For Madison Avenue". Women's Wear. Vol. 29, no. 142. December 17, 1924. p. 45. ProQuest1676842920.
"New Quarters For Marshall Field And Stehli Silks: Both Firms Sign Lease In 25-Story Building To Be Erected North Of Altman's On Madison Avenue". Women's Wear. Vol. 30, no. 53. March 5, 1925. p. 2. ProQuest1677111952.
"Marshall Field & Co. and Stelhi Silks Company Lease Madison Avenue Space". The New York Times. March 5, 1925. p. 33. ISSN0362-4331. ProQuest103655797.
"Silks: Bachmann, Emmerich To Take New Space". Women's Wear. Vol. 32, no. 75. March 31, 1926. p. 10. ProQuest1677004462.
"Clothier to Pay High Rental for Broadway Space: Store and Part of Floor in New Paramount Building Leased for $1,000,000; Importer at 38th Street". New York Herald Tribune. October 3, 1926. p. C1. ProQuest1112637555.
"Commercial Space Leased: W.L. Brann to Locate in the Madison Avenue Tower Building". The New York Times. October 2, 1926. p. 33. ISSN0362-4331. ProQuest103741222.
"Large Space Leased In New Building On Madison Ave.: International Combustion Engineering Corp. Takes 80,000 Feet, Comprising 7 Floors; Other Rentals". New York Herald Tribune. August 26, 1926. p. 28. ProQuest1112983742.
"Marshall Field to Open Fifth Show Room Here: 200 Madison Avenue Site to Start Business Wednesday". New York Herald Tribune. April 11, 1936. p. 22. ProQuest1250073121.
"American Enka Corp. Moves to Madison Ave.: Will Leave Downtown Location; Stock Firm Moves to Broad St. Building". New York Herald Tribune. December 31, 1928. p. 27. ProQuest1255571083.
"Shoe Firm Expands: Kitty Kelly Corp. Gets 2 Floors in 200 Madison Avenue". The New York Times. August 4, 1943. p. 31. ISSN0362-4331. ProQuest106640531.
"Makes Analysis Of Forgiveness Of Indebtment': Controller of Harmon Co. Clarifies the Voluntary Adjustment of Principal New York Home of Many Important Concerns". New York Herald Tribune. April 28, 1940. p. C6. ProQuest1243081118.
"Jacob Sincoff Acquires 46-Acre Danbury Estate". New York Herald Tribune. September 14, 1941. p. C11. ProQuest1284438083.
"Big Midtown Building Is Sold in Foreclosure". New York Herald Tribune. September 24, 1941. p. 36. ProQuest1263469194.
"Amtorg Taking Smaller Office; Business Is Off: Soviet Agency's War-Time Staff of 700 Is Now 30; Trade Drops 92 Million". New York Herald Tribune. July 7, 1950. p. 8. ProQuest1327269192.
"200 Madison Av. Acquired By Harry Mabel Syndicate". New York Herald Tribune. September 28, 1954. p. 33. ProQuest1318513917.
Grant, Peter (September 4, 1990). "After Leona: A Bleak Helmsley-Spear Future". Crain's New York Business. Vol. 5, no. 36. p. 1. ProQuest219127916.
Rosenfeld, Neill S. (March 4, 1986). "Marcos' NY Properties Frozen By State Court at Aquino Behest". Newsday. p. 5. ISSN2574-5298. ProQuest285295278.
"Manila Sues for Title to Marcos' N.Y. Properties". Los Angeles Times. December 30, 1986. p. 5. ProQuest292531084.
Grant, Peter (May 1, 1989). "New Twists in Battle for Marcos' Spoils". Crain's New York Business. Vol. 5, no. 18. p. 23. ProQuest219147299.
Barsky, Neil (February 22, 1989). "Philippines Sets Sale of Buildings Marcos Owned". Wall Street Journal. p. 1. ISSN0099-9660. ProQuest398089675.
Grant, Peter (September 3, 1990). "DiLorenzo's Empire on Skids". Crain's New York Business. Vol. 6, no. 36. p. 1. ProQuest219122539.
Slatin, Peter (July 16, 1995). "When It Can Pay to Own the Ground Underneath: There are advantages to controlling both buildings and land". The New York Times. p. R11. ISSN0362-4331. ProQuest109530704.
"Inter. Combustion in Fine New Home". The Philadelphia Inquirer. January 30, 1927. p. 6. Archived from the original on April 20, 2022. Retrieved April 20, 2022 – via newspapers.com.
Crane, Frank W. (September 14, 1941). "Murray Hill Foreclosure Recalls Astor's Fight to End Trade Ban: Zoning Restrictions on Madison Ave. Site Were Lifted After His Death, When Estate Sold Property for Present Building". The New York Times. p. RE1. ISSN0362-4331. ProQuest105614629.
"Newspaper Specials: Exclusive Dispatches in New York, Chicago, Philadel- phia, Detroit and Boston Papers". Wall Street Journal. December 18, 1924. p. 13. ISSN0099-9660. ProQuest130225757.
"Marshall Field & Co. and Stelhi Silks Company Lease Madison Avenue Space". The New York Times. March 5, 1925. p. 33. ISSN0362-4331. ProQuest103655797.
"Commercial Space Leased: W.L. Brann to Locate in the Madison Avenue Tower Building". The New York Times. October 2, 1926. p. 33. ISSN0362-4331. ProQuest103741222.
"Shoe Firm Expands: Kitty Kelly Corp. Gets 2 Floors in 200 Madison Avenue". The New York Times. August 4, 1943. p. 31. ISSN0362-4331. ProQuest106640531.
Manapat, Ricardo (1991). Some are smarter than others: the history of Marcos' crony capitalism. Aletheia Publications. ISBN978-9719128700. OCLC28428684.
Slatin, Peter (July 16, 1995). "When It Can Pay to Own the Ground Underneath: There are advantages to controlling both buildings and land". The New York Times. p. R11. ISSN0362-4331. ProQuest109530704.