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The American Institute of Architects Archives
Membership file includes application and membership correspondence. His Fellowship nomination is not in the AIA Archives.
Architecture Research Center, University of Miami Libraries, Coral Gables, Florida
Robert Bradford Browne Collection. Online finding aid at https://atom.library.miami.edu/arc6600. For more information https://atomwww.library.miami.edu/university-of-miami-school-of-architecturearchitecture/