Endler, John A.,  1947- <br/><br/>
Geographic variation, speciation, and clines / 
John A. Endler 
 - Princeton, N.J. :  Princeton University Press,  1977 
 - ix, 246 p. :  ill. ;  22 cm. 
 - Monographs in population biology ;  10 .
 - Monographs in population biology ;  10 .
<br/><br/>Bibliography: p.187-239 
<br/><br/><label>ISBN: </label>0691081875 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Clines<br/>Origin of species