TY  - BOOK
AU  - Keen, F. P.
TI  - Insect enemies of western forest
T2  - U.S. Dept. of Agriculture
U1  - 634.967 
PY  - 1938///
CY  - Washington
PB  - Government Printing Office
KW  - Árboles
KW  - Plagas
ER  -