Fretwell, Stephen D. <br/><br/>
Populations in a seasonal environment / 
by Stephen D. Fretwell 
 - Princeton, N. J. :  The University Press,  1972 
 - xxiii, 217 p. ;  23 cm. 
 - Monographs in population biology ;  vol. 5 .
<br/><br/><label>ISBN: </label>0691081050 :  USD 11.50 0691081069 (pbk) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Animal Populations<br/>Phenology<br/>Population--Environmental aspects
<br/><br/><label>Dewey Class. No.: </label>574.52