NATIONAL Symposium on "approach to higher productivity of crops " (Calcutta: 1978) Gupta, D.K.Das
Higher productivity in agriculture /
19-20- May 1978: Calcutta, edited by D.K.Das Gupta, N.C.Chattopadhyay
- New Delhi Oxford & IBH publishing Co. 1980
- 178 p.
68584
631.5 / NAT