Keen, F. P. <br/><br/>
Insect enemies of western forest 

 - Washington :  Government Printing Office,  1938 
 - 210 p.  : ilus. 
 - U.S. Dept. of Agriculture  ; 273 .
 - U.S. Dept. of Agriculture  ; 273 .
<br/><br/><label>LCCN: </label>27208 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Árboles--Plagas.
<br/><br/><label>Dewey Class. No.: </label>634.967  / K44