Zirkle, Conway,  1895- <br/><br/>
Evolution, Marxian biology, and the social scene / 
Conway Zirkle 
 - Philadelphia :  The University of Pennsylvania Press  c1959 
 - 527 p. ;  22 cm. 
<br/><br/> Includes index 
<br/><br/>Includes bibliography: p. 501-520 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Genetics<br/>Evolution (Biology)
<br/><br/><label>Dewey Class. No.: </label>575