Columbia subject headings:
Historic sites--United States--Directories.
Historical museums--United States--Directories.
United States--History--Archival resources--Directories.
United States--History--Library resources--Directories.
United States--History--Societies, etc.--Directories.
Harvard subject headings:
Historic sites--United States--Directories
Historical museums--United States--Directories.
United States--History--Archival resources--Directories.
United States--History--Archival resources.
United States--History--Library resources--Directories.
United States--History--Library resources.
United States--History--Societies, etc.--Directories.
Princeton subject headings:
Directories.
Historic sites--United States--Directories.
Historical museums--United States--Directories.
United States--History--Archival resources--Directories.
United States--History--Library resources--Directories.
United States--History--Societies, etc.--Directories.