Ehrlich, Paul R. <br/><br/>
Teachers manual Population resources environment:  issues in human e cology /  
Paul R. Ehrlich, Anne H. Ehrlich 
 - 2nd ed. 
 - San Francisco, California :    Freeman,    1972 
 - 30 p. ;    24 cm. 
<br/><br/><label>Dewey Class. No.: </label>P 304.2 E37