Ehrlich, Paul R. <br/><br/>
Population resources environment :  issues in human ecology 
/ Paul R. Ehrlich and Anne H. Ehrlich. 
 - Islamabad :  NBF,  1970 
 - 383 p. :  illus.  26 cm. 
 - A Series of books in biology .
<br/><br/> Third ed. published in 1977 under title: Ecoscience. 
<br/><br/>numbers of people;<br/>population structure and projection;<br/>the limits of the earth;<br/>food production;<br/>environmental threats to man;<br/>ecosystems in jeopardy;<br/>optimum population and human biology;<br/>birth control;<br/>family planning and population control;<br/>social, political and economic change;<br/>the international scene<br/> 
<br/><br/><label>ISBN: </label>0716706806 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Population.<br/>Pollution.<br/>Human ecology.
<br/><br/><label>Dewey Class. No.: </label>301.3  / E337