Herries, William (1916). Brooklyn Daily Eagle Almanac. Brooklyn Daily Eagle. p. 119. Archived from the original on May 11, 2021. Retrieved December 24, 2020.
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Hood, Clifton (1978). "The Impact of the IRT in New York City"(PDF). Historic American Engineering Record. pp. 146–207 (PDF pp. 147–208) This article incorporates text from this source, which is in the public domain.. Archived(PDF) from the original on January 17, 2021. Retrieved December 20, 2020.
Framberger, David J. (1978). "Architectural Designs for New York's First Subway"(PDF). Historic American Engineering Record. pp. 1–46 (PDF pp. 367–412) This article incorporates text from this source, which is in the public domain.. Archived(PDF) from the original on January 17, 2021. Retrieved December 20, 2020.
Scott, Charles (1978). "Design and Construction of the IRT: Civil Engineering"(PDF). Historic American Engineering Record. pp. 208–282 (PDF pp. 209–283) This article incorporates text from this source, which is in the public domain.. Archived(PDF) from the original on January 17, 2021. Retrieved December 20, 2020.
"$4,000,000 in Construction on I. R. T. Ordered: 33d St. on East Side Subway Will Be Express Stop; Local Stations to Have 10-Car Train Capacity Aim to Speed Service Improvements Will Relieve Congestion Along Both Routes. Board Believes". New-York Tribune. December 18, 1922. p. 22. ProQuest573974563.
"I. R. T. Wins Delay At Subway Platform Extension Hearing: Transit Commission Head Tells Meeting Widening West Side Stations Would Increase Capacity 25 P. C". New-York Tribune. September 7, 1923. p. 6. ProQuest1237290874.
"Transit Unification Completed As City Takes Over I. R. T. Lines: Systems Come Under Single Control After Efforts Begun in 1921; Mayor Is Jubilant at City Hall Ceremony Recalling 1904 Celebration". New York Herald Tribune. June 13, 1940. p. 25. ProQuest1248134780.
Herries, William (1916). Brooklyn Daily Eagle Almanac. Brooklyn Daily Eagle. p. 119. Archived from the original on May 11, 2021. Retrieved December 24, 2020.
Hood, Clifton (1978). "The Impact of the IRT in New York City"(PDF). Historic American Engineering Record. pp. 146–207 (PDF pp. 147–208) This article incorporates text from this source, which is in the public domain.. Archived(PDF) from the original on January 17, 2021. Retrieved December 20, 2020.
Framberger, David J. (1978). "Architectural Designs for New York's First Subway"(PDF). Historic American Engineering Record. pp. 1–46 (PDF pp. 367–412) This article incorporates text from this source, which is in the public domain.. Archived(PDF) from the original on January 17, 2021. Retrieved December 20, 2020.
Scott, Charles (1978). "Design and Construction of the IRT: Civil Engineering"(PDF). Historic American Engineering Record. pp. 208–282 (PDF pp. 209–283) This article incorporates text from this source, which is in the public domain.. Archived(PDF) from the original on January 17, 2021. Retrieved December 20, 2020.