TY  - GEN
AU  - Das Gupta D K, Chattopadhyay N C
TI  - Higher productivity in agriculture: proceedings of the national symposium on approach to higher productivity of crops held at Calcutta
U1  - 338.16 DAS 
CY  - Newdelhi, Oxford & IBH publishing company
KW  - Agriculture/productivity/management/socio-economic factors
ER  -