Schmalhausen I I <br/><br/>
Factors of evolution 

 - Philadelphia  Blakiston           1949 
 - xiv, 327p.  cm. 
<br/><br/><label>Standard No.: </label>39996 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Biology
<br/><br/><label>Dewey Class. No.: </label>G:66, H9;1