Parmenter, G N <br/><br/>
Association of American Geographers (E1).  [electronic resource] 

 -  Science (New York, N.Y.)  Feb 1963 
 - 636 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0036-8075 
<br/><br/><label>Standard No.: </label>10.1126/science.139.3555.636  doi