Levins, Richard. <br/><br/>
Evolution in changing environments :  some theoretical explorations / 
Richard Levins  
 - Princeton, N.J.,  Princeton University Press,  1968. 
 - ix, 120 p. :  illus. ;  23 cm. 
<br/><br/>Bibliography: p. 113-116. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Animal populations.<br/>Animal population genetics.<br/>Evolution.<br/>Ecology.
<br/><br/><label>Dewey Class. No.: </label>591.5  / LEE 1968