Levins, Richard <br/><br/>
Evolution in changing environments :  some theoretical explorations / 
Richard Levins 
 - Princeton, N. J. :  Princeton University Press,  1968 
 - 120 p. ;  23 cm. 
 - Monographs in population biology ;  no.2 .
 - Monographs in population biology ;  no.2 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Animal populations<br/>Population genetics<br/>Evolution<br/>Ecology