Columbia subject headings:
Harvard subject headings:
United States Capitol (Washington, D.C.)--Guidebooks.
Washington (D.C.)--Buildings, structures, etc.--Guidebooks.
Princeton subject headings:
Guidebooks.
United States Capitol (Washington, D.C.)--Guidebooks.
United States. Congress--History.
Washington (D.C.)--Buildings, structures, etc.--Guidebooks.
Washington (D.C.)--Tours.