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] 
 - xiv, 509 p. :  illus. ;  27 cm. 
 - A Series of books in biology  .
<br/><br/> Third ed. published in 1977 under title: Ecoscience.  
<br/><br/>Includes bibliographies.  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Population. <br/>Pollution. <br/>Human ecology. 
<br/><br/><label>Dewey Class. No.: </label>301.3