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"The Washington Building"(PDF). The Real Estate Record: Real Estate Record and Builders' Guide. Vol. 43, no. 1102. April 27, 1899. p. 583. Archived(PDF) from the original on February 12, 2020. Retrieved February 12, 2020 – via columbia.edu.
Alden, H.M. (1893). Harper's New Monthly Magazine. Harper & Brothers. p. 344. Archived from the original on October 4, 2020. Retrieved February 8, 2020.
"Out Among the Builders"(PDF). The Real Estate Record: Real Estate Record and Builders' Guide. Vol. 29, no. 742. June 3, 1882. p. 553. Archived(PDF) from the original on February 12, 2020. Retrieved February 12, 2020 – via columbia.edu.
"Satisfied Judgments"(PDF). The Real Estate Record: Real Estate Record and Builders' Guide. Vol. 373, no. 941. March 27, 1886. p. 407. Archived(PDF) from the original on September 1, 2020. Retrieved February 14, 2020 – via columbia.edu.
"Out Among the Builders"(PDF). The Real Estate Record: Real Estate Record and Builders' Guide. Vol. 36, no. 905. July 18, 1885. p. 813. Archived(PDF) from the original on February 12, 2020. Retrieved February 12, 2020 – via columbia.edu.
"Contracts Awarded"(PDF). The Real Estate Record: Real Estate Record and Builders' Guide. Vol. 81, no. 2078. January 11, 1908. p. 85. Archived(PDF) from the original on February 12, 2020. Retrieved February 12, 2020 – via columbia.edu.
"Buys 1 Broadway"(PDF). The Real Estate Record: Real Estate Record and Builders' Guide. Vol. 104, no. 22. November 29, 1919. p. 540. Archived(PDF) from the original on February 12, 2020. Retrieved February 12, 2020 – via columbia.edu.
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