The New York City Landmarks Preservation Commission
The New York City Buildings Department
The New York City Municipal Archives
New York City Department of Finance - Office of the City Register
City Hall Library (formerly New York City Municipal Reference and Research Center)
New York City Department of Records and Information Services (DORIS)
The National Register of Historic Places
Columbia University's Avery Library
Avery Index to Architectural Periodicals
Brooklyn Public Library, Brooklyn Collection
Queens Borough Public Library, Long Island Division
Staten Island Institute of Arts and Sciences
Museum of the City of New York