TY  - BOOK
AU  - Grewal, J.S.
AU  - Sharma, R.C.
AU  - Trehan, S.P.
TI  - Phosphorus and polassium nutrition of potato
T2  - (Technical bulletin; no31)
PY  - 0000///
CY  - Shimla
PB  - Central Potato Research Institute
ER  -