Greenwood, N.H. <br/><br/>
Human environments and natural systems/ 
N. H. Greenwood  
 - Massachusetts:      Duxbury Press,  1979 
 - xii, 548p.;  24 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Human ecology<br/>Ecology<br/>Environment
<br/><br/><label>Dewey Class. No.: </label>301.3  / GRE