Columbia subject headings:
Legislators--United States--Archives--Directories.
United States--Politics and government--Archival resources--Directories.
United States. Congress. Senate--Archives--Directories.
Harvard subject headings:
Legislators--United States--Archives--Directories.
United States--Politics and government--Archival resources--Directories.
United States. Congress. Senate--Archives--Directories.
Princeton subject headings:
Legislators--United States--Archives--Directories.
United States--Politics and government--Archival resources--Directories.