Endler, John A <br/><br/>
Geographic variation, speciation, and clines 
John A. Endler 
 - Princeton, NJ  Princeton University Press  1977 
 - ix, 246 p. : ill. ; 23 cm 
<br/><br/><label>ISBN: </label>9780691081922 
<br/><br/><label>ISSN: </label>76045896 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Clines<br/>Evolution (Biology)
<br/><br/><label>Dewey Class. No.: </label>575 END