Columbia subject headings:
Harvard subject headings:
Clark's Expedition to the Illinois (1778-1779)
Clark's Expedition to the Illinois, 1778-1779.
Illinois--Politics and government.
Northwest, Old--History--Revolution, 1775-1783.
Northwest, Old--History--Revolution.
Princeton subject headings:
Clark's Expedition to the Illinois, 1778-1779.
Illinois--Politics and government.
Northwest, Old--History--Revolution.