Greenwood, N. H. <br/><br/>
Human environments and natural systems / 
N. H. Greenwood and J. M. B. Edwards 
 - 2nd ed. 
 - California :   Duxbury Press,  1973. 
 - xii, 429p. :  ill. ;   24 cm. 
<br/><br/>Includes bibliographies and index 
<br/><br/><label>ISBN: </label>0878721681 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Human ecology <br/>Environmental protection<br/>Land use Environmental Aspects
<br/><br/><label>Dewey Class. No.: </label>711 GRH