Columbia subject headings:
Harvard subject headings:
City planning--Washington (D.C.)--History--Congresses.
Mall, The (Washington, D.C.)--History--Congresses.
Washington (D.C.)--Buildings, structures, etc.--History--Congresses.
Princeton subject headings:
Mall, The (Washington, D.C.)--History--Congresses.
Washington (D.C.)--Buildings, structures, etc.--Congresses.