TY  - BOOK
AU  - Chopra, V.L. ; Singh, R.B. ; Varma, Anupam
TI  - Crop productivity and sustainability : shaping the future: Proceedings of the 2nd international crop science congress
SN  - 8120412125
PY  - 1998///
CY  - New Delhi
PB  - Oxford & IBH Publishing
ER  -