Ehrlich, Paul R. <br/><br/>
Population resources environment :  issues in human ecology / 
Paul R. Ehrlich, Anne H. Ehrlich. 
 - San Francisco :  W. H. Freeman,  1970. 
 - 383 p. :  ill. 
 - A Series of books in biology .
<br/><br/> Third ed. published in 1977 under title: Ecoscience. 
<br/><br/>Bibliography: p. [360]-363. 
<br/><br/><label>ISBN: </label>0716706806 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Population.<br/>Pollution.<br/>Human ecology.