Columbia subject headings:
Harvard subject headings:
Architecture, Modern--20th century--United States--Catalogs.
Hartman-Cox Architects--Catalogs.
Princeton subject headings:
Architectural firms--United States.
Architectural firms--Washington (D.C.).
Architecture, Modern--20th century--Washington (D.C.).
Architecture--United States--History--20th century.
Cox, Warren J.
Hartman, George E.
Hartman-Cox Architects.
Washington (D.C.)--Buildings, structures, etc.