Ehrlich, Paul R. <br/><br/>
Human ecology :  problems and solutions / 
By Paul R. Ehrlich, Anne H. Ehrlich and John P. Holdren. 
 - San Francisco, Calif. :  W. H. Freeman,  1973. 
 - 304 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographies. 
<br/><br/><label>ISBN: </label>0716705958 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology.<br/>Environmental health.<br/>Population control.<br/>Population growth