Wickman, B. E. <br/><br/>
How to estimate defoliation and predict tree damage / 
 Douglas-Fir Tussock moth handbook :  how to estimate defoliation and predict tree damage  
by B. E. Wickman 
 - Washington, D.C. :  U.S. Government Printing Office,  1979 
 - 15 p. :  ill. ;  24 cm. 
 - Agriculture Handbook;  no. 550 .
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plant quarantine--United States<br/>Douglas fir tussock moth.
<br/><br/><label>Dewey Class. No.: </label>US 632.930973  / W 632 (1979)