TY  - BOOK
AU  - Wickman,B.E.
AU  - 
ED  - United States.
ED  - United States.
TI  - How to estimate defoliation and predict tree damage
U1  - US 632.930973 23rd ed.
PY  - 1979///
CY  - Washington, D.C.
PB  - U.S. Government Printing Office
KW  - Plant quarantine
KW  - United States
KW  - Douglas fir tussock moth
N1  - Index3
ER  -