TY  - BOOK
AU  - Sill, Webster H., Jr.
TI  - The plant protection discipline: : problems and possible developmental strategies
U1  - 632 
PY  - 1978///
CY  - Montclair, N. J.
PB  - Allanheld Osmun
KW  - Control de plagas
KW  - Fitopatología
ER  -