Irma and Paul Milstein Division of United States History, Local History and Genealogy, The New York Public Library. "Cathedral of St. John the Divine under construction; Morningside Park;Columbia University" The New York Public Library Digital Collections. 1902. http://digitalcollections.nypl.org/items/c45a3eb0-b3b4-0132-e004-58d385a7bbd0
Irma and Paul Milstein Division of United States History, Local History and Genealogy, The New York Public Library. "Cathedral of St. John the Divine under construction; Morningside Park;Columbia University" New York Public Library Digital Collections. Accessed May 24, 2019. http://digitalcollections.nypl.org/items/c45a3eb0-b3b4-0132-e004-58d385a7bbd0
Irma and Paul Milstein Division of United States History, Local History and Genealogy, The New York Public Library. (1902). Cathedral of St. John the Divine under construction; Morningside Park;Columbia University Retrieved from http://digitalcollections.nypl.org/items/c45a3eb0-b3b4-0132-e004-58d385a7bbd0
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