Duncan, S S <br/><br/>
Qualitative change in human geography / 
Duncan, S S 
 -  Pergamon Press, Oxford,  1981 
 - p. ;  22 cm. 
<br/><br/><label>ISBN: </label>0080252222 
<br/><br/><label>Subjects--Topical Terms: </label><br/>General world history
<br/><br/><label>Dewey Class. No.: </label>909 DUN-Q