Columbia subject headings:
Executive power--United States.
Presidents--United States.
United States--Politics and government--1933-1945.
United States--Politics and government--1945-1989.
Harvard subject headings:
Executive power--United States
Presidents--United States
United States--Politics and government--1933-1945.
United States--Politics and government--1945-1989.
Princeton subject headings:
Executive power--United States.
Presidents--United States.
United States--Politics and government--1933-1945.
United States--Politics and government--1945-.