Columbia subject headings:
Architects--New York (State)--New York--Directories.
Architecture--New York (State)--New York--Directories.
Harvard subject headings:
Architects--New York (State)--New York--Directories.
Architecture--New York (State)--New York--Directories.
Princeton subject headings:
Architects--New York (State)--New York--Directories.
Architecture, Modern--20th century--New York (State)--New York--Directories.