Columbia subject headings:
United States. Congress--Elections--Statistics--Periodicals.
United States. Congress. House--Elections--Statistics--Periodicals.
United States. Congress. Senate--Elections--Statistics--Periodicals.
Harvard subject headings:
Presidents--United States--Election--Statistics--Periodicals.
United States. Congress--Elections--Statistics--Periodicals.
United States. Congress. House--Elections--Statistics--Periodicals.
United States. Congress. Senate--Elections--Statistics--Periodicals.
Princeton subject headings:
Periodicals.
Statistics.
United States. Congress--Elections--Statistics--Periodicals.
United States. Congress. House--Elections--Statistics--Periodicals.
United States. Congress. Senate--Elections--Statistics--Periodicals.