Ehrlich, Paul R. <br/><br/>
Ecoscience :  population, resources, environment / 
Paul R. Ehrlich, Anne H. Ehrlich, John P.Holdren 
 - 3rd. ed. 
 - San Francisco :  W.H.Freeman,  1977 
 - 1051 p. :  ill, ;  24 cm. 
<br/><br/> First-2nd ed. published under title: Population, resources, environment  Includes indexes 
<br/><br/>Includes bibliographical references 
<br/><br/><label>ISBN: </label>0716705672 
<br/><br/><label>LCCN: </label>77-6824 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Population<br/>Pollution<br/>Human ecology