TY  - BOOK
AU  - Roberts, H.A..
TI  - Weed control handbook:principles:Issued by the british crop protection council / 
SN  - 0-632-01018-5
U1  - I:54.56 
PY  - 1991///
CY  - Oxford : 
PB  - Blackwell Scientific Publications , 
KW  - Weeds Biology
ER  -