TY  - BOOK
AU  - Williams, R.D.
TI  - Crop protection handbook-grass and clover swards
U1  - 633.2 
PY  - 1984///
CY  - Croydon
PB  - Brithish Crop Protection Council
KW  - Pastos
KW  - Enfermedades
KW  - Malas hierbas
KW  - Control
ER  -