Columbia subject headings:
Herbert Hoover Presidential Library--Catalogs.
Hoover, Herbert, 1874-1964--Archives--Catalogs.
United States--History--1919-1933--Sources--Bibliography--Catalogs.
United States--Politics and government--1929-1933--Sources--Bibliography--Catalogs.
Harvard subject headings:
Herbert Hoover Presidential Library--Catalogs.
Hoover, Herbert, 1874-1964--Archives--Catalogs.
United States--History--1919-1933--Sources--Bibliography--Catalogs.
United States--Politics and government--1929-1933--Sources--Bibliography--Catalogs.
Princeton subject headings:
Catalogs.
Herbert Hoover Presidential Library--Catalogs.
Hoover, Herbert, 1874-1964--Archives--Catalogs.
United States--History--1919-1933--Sources--Bibliography--Catalogs.
United States--Politics and government--1929-1933--Sources--Bibliography--Catalogs.