Columbia subject headings:
Documents on microfilm--Catalogs.
Sumner, Charles, 1811-1874--Archives--Microform catalogs.
United States--Politics and government--1849-1877--Sources--Bibliography--Microform catalogs.
Harvard subject headings:
Documents on microfilm--Catalogs.
Sumner, Charles, 1811-1874--Archives--Microform catalogs.
United States--Politics and government--1849-1877--Sources--Bibliography--Microform catalogs.
Princeton subject headings: