TY  - BOOK
AU  - Yadava, N D,et al
TI  - Cropping system research in India-(1980-91)
SN  - 8173410100
U1  - 631.38/YAD 
PY  - 1994///
CY  - Delhi
PB  - Indian Publishers Distributor
KW  - Cropping systems
ER  -