Staples, Zenas Carleton. <br/><br/>
Economic geography / 
Zenas Carleton Staples. 
 - 3rd ed. 
 - Cincinnati ;  New York :  Southwestern publishing co.,  c1940. 
 - 1 p. l., 702 p. :  illus. (incl. maps) diagrs. ;  22 cm. 
<br/><br/>Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Commercial geography.
<br/><br/><label>Dewey Class. No.: </label>330.9  / STE 1940