Ehrlich . Paul R  Ehrlich . Anne H  Holdren . John P <br/><br/>
Human Ecology Problems And Solutions 

 - San Francisco  W . H freeman And Company  1973 
 - 304 p. 
<br/><br/><label>ISBN: </label>0-7167-0595-8 
<br/><br/><label>Dewey Class. No.: </label>577  / EHR