Hedlin, Alan F. <br/><br/>
Cone and seed insects of North American conifers 

 - Ottawa :  Canadian Forestry Service,  1980 
 - 122 p.  : ilus. 
<br/><br/><label>LCCN: </label>59764 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Coníferas--Plagas.<br/>Conos.<br/>Semillas forestales.
<br/><br/><label>Dewey Class. No.: </label>634.975  / H4