Walmsley, D. J. <br/><br/>
Systems theory: a framework for human geographic enquiry 

 - Canberra  Australian National University  1972 
 - 93p.  29cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Economic geography
<br/><br/><label>LC Class. No.: </label>QTO GF23.W26