Columbia subject headings:
Apportionment (Election law)--United States--History.
Proportional representation--United States--History.
Representative government and representation--United States--History.
Harvard subject headings:
Apportionment (Election law)--United States--History.
Proportional representation--United States--History.
Representative government and representation--United States--History
Princeton subject headings:
Apportionment (Election law)--United States--History.
Proportional representation--United States--History.
Representative government and representation--United States--History.