Undaunted courage : Meriwether Lewis, Thomas Jefferson, and the opening of the American West /
Ambrose, Stephen E.
New York, N.Y. ; London : Simon & Schuster,
c1996.
Includes bibliographical references and index.
Lewis, Meriwether, 1774-1809.
Jefferson, Thomas, 1743-1826.
Clark, William, 1770-1838.
Lewis and Clark Expedition (1804-1806)
Explorers