Across the continent : Jefferson, Lewis and Clark, and the making of America /

Published 2005

The American wild west : a study of change and response /

by Naumann, Ruth
Published 1992

Letters of the Lewis and Clark Expedition : with related documents, 1783-1854 /

Published 1962

A life wild and perilous : mountain men and the paths to the Pacific /

by Utley, Robert M. (Robert Marshall), 1929-
Published 1997

The Mormon role in the settlement of the West /

Published 1978

Narrative of the exploring expedition to the Rocky Mountains, in the year 1842 : and to Oregon and north California, in the years 1843-44 /

by Frémont, John Charles, 1813-1890
Published 1846

The Plains across : the overland emigrants and the trans-Mississippi West, 1840-60 /

by Unruh, John D.
Published 1979

Three years among the Indians and Mexicans /

by James, Thomas, 1782-1847
Published 1984

The year of decision, 1846 /

by De Voto, Bernard Augustine, 1897-1955
Published 1957