Ehrlich, Paul R. <br/><br/>
Population resources environment 

 - 2nd ed. 
 - London  W.H. Freeman and Company  1972 
 - xiv, 509p. 
<br/><br/><label>ISBN: </label>0716706954 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental
<br/><br/><label>LC Class. No.: </label>MED. HB871  / E35