Columbia subject headings:
Presidents--United States--Dictionaries.
United States--Politics and government--Dictionaries.
United States. Congress--Dictionaries.
Harvard subject headings:
Presidents--United States--Dictionaries.
United States--Politics and government--Dictionaries.
United States. Congress--Dictionaries.
Princeton subject headings:
Dictionaries.
Presidents--United States--Dictionaries.
United States--Politics and government--Dictionaries.
United States. Congress--Dictionaries.