Ehrlich, Paul  R. <br/><br/>
Population resources environment :  issues in human ecology / 
[by] Paul R. Ehrlich and Ann H. Ehrlich. 
 - San Francisco :  Freeman,  [c1970] 
 - 383 p. illus. 26 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Population<br/>Pollution<br/>Human ecology
<br/><br/><label>LC Class. No.: </label>301.32  / Eh89