Ehrlich, Paul R. <br/><br/>
Population, resources, environment;  issues in human ecology 
[by] Paul R. Ehrlich [and] Anne H. Ehrlich. 
 - 2d ed. 
 - San Francisco,  W. H. Freeman  [1972] 
 - 383 P,  25 cm. 
 - A Series of books in biology .
<br/><br/> Third ed. published in 1977 under title: Ecoscience. 
<br/><br/>
<br/><br/><label>Subjects--Topical Terms: </label><br/>Human ecology.<br/>Pollution.<br/>Population.
<br/><br/><label>Dewey Class. No.: </label>337.7  / EHR