Graham, S. A. <br/><br/>
The spruce budworm in Minnesota  / 
S. A. Grahan and L. W. Orr 
 - St. Paul, Minnesota  :   University of Minnesota 
 - 27 p. 
 - Minnesota Agr. Exp. Sta. Tech. Bull.; 142 .
<br/><br/><label>LCCN: </label>202240 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Choristoneura fumiferana  Arboles -- Plagas