39 Steps to biology / 
with introductions by Garrett Hardin 
 - San Francisco :  W. H. Freeman,  1952 
 - 344 p. :  ill. ;  29 cm. 
<br/><br/>Bibliography (p. 329-340) 
<br/><br/><label>LCCN: </label>68-021673 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Biology