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The American Institute of Architects Archives
Membership file contains membership application, correspondence re unsuccessful Fellowship nomination in 1926, successful Fellowship nomination in 1932, obituaries. Baum was one of the designers of the AIA's new Administration and Library Building in 1939 (no longer extant), and there is material in the board minutes concerning the building committee's work.
Special Collections Research Center, Syracuse University Library
Dwight James Baum Papers
For more information, see https://library.syr.edu/scrc/
Publications
Bibliography of articles by/about Baum and his works compiled in 1976 by AIA Library staff (from Baldwin Memorial files).