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. 
<br/><br/> Third ed. published in 1977 under title: Ecoscience.  
<br/><br/>Includes bibliographical references.  
<br/><br/>The crisis -- Numbers of people -- Population structure and projection -- The limits of the earth -- Food production -- Environmental threats to man -- Ecosystems in jeopardy -- Optimum population and human biology -- Birth control -- Family planning  and population control -- Social, political, and economic changes -- The international scene -- Conclusions. 
<br/><br/><label>ISBN: </label>0071676953 0716706954 9780071676953 9780716706953 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Human ecology.<br/>Pollution.<br/>Population.<br/>Ecology.<br/>Population Growth.<br/>Contaminaciâon.<br/>Ecologâia humana.<br/>âEcologie humaine.<br/>Pollution.<br/>Population.<br/>âEcologie humaine.<br/>Pollution.<br/>Population.<br/>Bevèolkerungswachstum.<br/>Umweltkrise.<br/>Bevolkingsvraagstuk.<br/>Ecologische aspecten.
<br/><br/><label>LC Class. No.: </label>HB871  / .E35 1972 
<br/><br/><label>National Library of Medicine Call No.: </label>HB 875  / E33pa 1972