Columbia subject headings:
Political parties--United States--Platforms--History--20th century.
Presidents--United States--Election--History--20th century.
United States--Politics and government--20th century.
Harvard subject headings:
Political parties--United States--Platforms--History--20th century.
Presidents--United States--Election--History--20th century
United States--Politics and government--20th century.
Princeton subject headings:
Political parties--United States--Platforms--History--20th century.
Presidents--United States--Election--History--20th century.
United States--Politics and government--20th century.