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The American Institute of Architects Archives
Architects Roster questionnaire, 1953, contains information about the firm and its key personnel.
Department of Drawings & Archives, Avery Architectural and Fine Arts Library, Columbia University
Kahn & Jacobs architectural drawings and papers, 1893-1965. Also includes materials from predecessor firms.
For more information https://library.columbia.edu/libraries/avery/da.htmlAnchor