Columbia subject headings:
Hoover, Herbert, 1874-1964.
Presidents--United States--Biography.
United States--Politics and government--20th century.
Harvard subject headings:
Hoover, Herbert, 1874-1964.
Presidents--United States--Biography
United States--Politics and government--20th century.
Princeton subject headings:
Hoover, Herbert, 1874-1964.
Presidents--United States--Biography.
United States--Politics and government--20th century.