TY  - BOOK
AU  - Whitten, R. R.
TI  - The internal application of chemicals to kill elm trees and prevent bark-beetle attack
U1  - PA-C 632 B85 
CY  - Washington, D. C.
PB  -  USDA
KW  - Hylurgopinus rufipes
KW  - Olmo
KW  -  Enfermedades
KW  -  Plagas
N1  - Enc. con impresos similares
ER  -