Ehrlich, Paul R. <br/><br/>
Population resources environment :  issues in human ecology / 
P aul R.Ehrlich. 
 - 2nd ed. 
 - San Francisco  :  W.H.Freeman and Company  ,  1972 
 - xiv, 509 P. :  ill. ;  26 cm. 
<br/><br/>Includes bibliographical references . 
<br/><br/><label>ISBN: </label>0716706954 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Human Ecology.
<br/><br/><label>Dewey Class. No.: </label>304.2 EHR