TY  - BOOK
ED  - Indian Standards Institution                                                                                                                                                                                                                                   . 
TI  - Method of field testing for manually operated paddy weeder, IS7929-1975 / 
U1  - 631.316 
PY  - 1976///
CY  - New Delhi : 
PB  - Indian Standards Institution , 
ER  -