Columbia subject headings:
Constitutional amendments--Illinois.
Constitutional history--Illinois--Sources.
Constitutional law--Illinois.
Harvard subject headings:
Constitutional conventions--Illinois--Sources.
Constitutional conventions--Illinois.
Constitutional history--Illinois--Sources.
Constitutional history--Illinois.
Constitutional law--Illinois
Constitutional law--Illinois--Sources.
Constitutions--Illinois--Sources.
Constitutions--Illinois.
Princeton subject headings:
Illinois--Constitutional history--Sources.
Illinois--Constitutional law.