Critchfield William B <br/><br/>
Geographic variation in pinus contorta 

 - Cambridge  Harvard University          1957 
 - vii,118p.  cm. 
 - Maria moors cabot foundation publication; 3 .
<br/><br/><label>Standard No.: </label>51432 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Gymnosperms<br/>Botany
<br/><br/><label>Dewey Class. No.: </label>I651:12, J7