Rensch, Bernhard <br/><br/>
Evolution above the species level  Bernhard Rensch. 

 - London  Methnen  1959 
 - xii, 419p.: ill. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Evolution (Biology) Natural selection  Genetics. 
<br/><br/><label>Dewey Class. No.: </label>575  / R39E