Columbia subject headings:
Frémont, John Charles, 1813-1890.
Oregon--History--Sources.
United States--Discovery and exploration.
West (U.S.)--Description and travel.
Harvard subject headings:
America--Discovery and exploration.
Frémont, John Charles, 1813-1890.
Oregon--History--Sources.
West (U.S.)--Description and travel.
Princeton subject headings:
Frémont, John Charles, 1813-1890.
Oregon--History--Sources.
United States--Exploring expeditions.
West (U.S.)--Description and travel.