Undaunted courage : Meriwether Lewis, Thomas Jefferson, and the opening of the American West - Ambrose, Stephen E. (New York : Simon & Schuster, 1996)
Includes bibliographical references (p. 493-496) and index.
Keywords: Lewis, Meriwether, -- 1774-1809.; Clark, William, -- 1770-1838.; Jefferson, Thomas, -- 1743-1826.; Explorers -- United States -- Biography