Clausen, Jens. <br/><br/>
Experimental studies on the nature of species 

 - Washington :  Carnegie Institution,  1940-48 
 - 3 v.  : ilus. 
<br/><br/> Contenio: v.1 Effect of varied environments on western north american plants -- v.2 Plant evolution throught amphiploidyand autoploidy, with... -- v.3 Environmental responses of climatic roces of achillea 
<br/><br/><label>LCCN: </label>21475 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Botánica--E.U.A.<br/>Ecología vegetal.<br/>Herencia.
<br/><br/><label>Dewey Class. No.: </label>581.52  / C53