Columbia subject headings:
Public buildings--Washington (D.C.)--Guidebooks.
Smithsonian Institution--Guidebooks.
Washington (D.C.)--Guidebooks.
Harvard subject headings:
Public buildings--Washington (D.C.)--Guidebooks.
Smithsonian Institution--Guidebooks.
Washington (D.C.)--Guidebooks
Princeton subject headings:
Guidebooks.
Public buildings--Washington (D.C.)--Guidebooks.
Smithsonian Institution--Guidebooks.
Washington (D.C.)--Guidebooks.