Ambrose, Stephen E. <br/><br/>
Undaunted courage :  Meriwether Lewis, Thomas Jefferson, and the opening of the American West / 
Stephen E. Ambrose. 
 - New York :  Simon & Schuster,  1996. 
 - 511 p. :  ill ;  25 cm. 
<br/><br/>Includes bibliographical references (p. 493-496) and index. 
<br/><br/><label>ISBN: </label>0684811073 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Explorers--Biography--United States