Harbeson, Hough, Livingston & Larson
Philadelphia, PA
American Architects Directories:
Listing in 1962 American Architects Directory
Listing in 1970 American Architects Directory
John Frederick Harbeson
William J. H. Hough
Roy F. Larson
William Henry Livingston
Successor to firm of Paul Philippe Cret
The American Institute of Architects Archives
Architects Roster questionnaire, 1946, contains information about the firm and its key personnel.