Greenwood, Ned H. <br/><br/>
Human environments and natural systems / 
N. H. Greenwood, J. M. B. Edwards. 
 - 2d ed. 
 - North Scituate, Mass. :  Duxbury Press,  c1979. 
 - xii, 548 p. :  ill. ;  24 cm. 
<br/><br/>Includes biliographies and index. 
<br/><br/><label>ISBN: </label>0878721681 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Human ecology.<br/>Environmental protection.<br/>Land use.
<br/><br/><label>Dewey Class. No.: </label>301.31  / GRH 1979