"Adds to Broadway Holdings". The Real Estate Record: Real Estate Record and Builders' Guide. Vol. 102, no. 17. October 26, 1918. p. 489. Archived from the original on November 10, 2020. Retrieved November 9, 2020 – via columbia.edu.
"Broadway and 57th St. Corner". The Real Estate Record: Real Estate Record and Builders' Guide. Vol. 82, no. 2126. December 12, 1908. p. 1122. Archived from the original on November 14, 2020. Retrieved November 9, 2020 – via columbia.edu.
"Contemplated Construction". The Real Estate Record: Real Estate Record and Builders' Guide. Vol. 100, no. 2576. July 28, 1917. p. 122. Archived from the original on November 16, 2020. Retrieved November 9, 2020 – via columbia.edu.
"Plans Filed for Alterations". The Real Estate Record: Real Estate Record and Builders' Guide. Vol. 103, no. 11. March 15, 1919. p. 156. Archived from the original on November 19, 2020. Retrieved November 9, 2020 – via columbia.edu.
"Recent Buildings". Architects' and Builders' Magazine. Vol. 42. November 1909. pp. 73–75. Archived from the original on January 18, 2021. Retrieved November 9, 2020.
Hughes, C. J. (May 16, 2022). "Blackstone surrenders 1950s office tower in ominous sign for struggling Midtown market: But brokers say rents below $80 per square foot will tempt tenants". Crain's New York Business. Vol. 38, no. 19. p. 4. ProQuest2666602196.
Orlando, Dan (May 19, 2015). "Eretz buys Argonaut for $214M". Real Estate Weekly. Archived from the original on November 13, 2020. Retrieved November 6, 2020.
"Adds to Broadway Holdings". The Real Estate Record: Real Estate Record and Builders' Guide. Vol. 102, no. 17. October 26, 1918. p. 489. Archived from the original on November 10, 2020. Retrieved November 9, 2020 – via columbia.edu.
"Broadway and 57th St. Corner". The Real Estate Record: Real Estate Record and Builders' Guide. Vol. 82, no. 2126. December 12, 1908. p. 1122. Archived from the original on November 14, 2020. Retrieved November 9, 2020 – via columbia.edu.
"Recent Buildings". Architects' and Builders' Magazine. Vol. 42. November 1909. pp. 73–75. Archived from the original on January 18, 2021. Retrieved November 9, 2020.
"Contemplated Construction". The Real Estate Record: Real Estate Record and Builders' Guide. Vol. 100, no. 2576. July 28, 1917. p. 122. Archived from the original on November 16, 2020. Retrieved November 9, 2020 – via columbia.edu.
"Plans Filed for Alterations". The Real Estate Record: Real Estate Record and Builders' Guide. Vol. 103, no. 11. March 15, 1919. p. 156. Archived from the original on November 19, 2020. Retrieved November 9, 2020 – via columbia.edu.
Orlando, Dan (May 19, 2015). "Eretz buys Argonaut for $214M". Real Estate Weekly. Archived from the original on November 13, 2020. Retrieved November 6, 2020.