Riegel, Robert Edgar,  1897- <br/><br/>
America moves west / 
by Robert E. Riegel and Robert G. Athearn 
 - 5th ed. 
 - Illinois :  The Dryden Press,  1971 
 - xiii, 599 p. :  ill., maps, ports. ;  25 cm. 
<br/><br/>Includes bibliographies 
<br/><br/><label>ISBN: </label>0030843162 
<br/><br/><label>LCCN: </label>72-113832 
<br/><br/><label>Subjects--Geographic Terms: </label><br/>West (U.S.)--History<br/>Mississippi River Valley--History