TY  - BOOK
AU  - Grewal, J.S.
AU  - Govindakrishnan, P.M.
AU  - Saini, S.S.
TI  - Potato based cropping systems
T2  - (Technical bulletin; no.30)
PY  - 1991///
CY  - Shimla
PB  - Central Potato Research Institute
ER  -