TY  - BOOK
AU  - HIRA, Labh Singh
TI  - Study of fertilizer production surface with specification of economic optima for wheat and rice
U1  - T 631.8 H67S 
PY  - 1971///
CY  - Ludhiana
PB  - P.A.U
KW  - FERTILIZERS AND MANURES
ER  -