Valkenburg, Samuel. Van <br/><br/>
Elements of Political Geography 

 - Dehli  Prence hall  1963 
 - 397 p. 
<br/><br/><label>ISBN: </label> 7.5 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Commerce
<br/><br/><label>Dewey Class. No.: </label>970  / U239