TY  - BOOK
AU  - Hance, R.J.
AU  - Holly, K.
TI  - Weed Control handbook: principles  
U1  - PA 632.58 H3 
CY  - Oxford
PB  -  Blackwell Scientific publications
KW  - Herbicidas
KW  - Malas hierbas
KW  -  control
ER  -