TY  - BOOK
AU  - Ray, Howard E.
TI  - Soil fertility evalution for increased farm production and profit
T2  - Fertilizer Association of India; proceedings, no.MKD/2
U1  - 631.45:631.15' 16:658.155 L2 
PY  - 1972///
CY  - New Delhi
PB  - The fertilizer association of India
KW  -  Howard E.Ray and E.K.S.Nambiar.
KW  - Soil,Fertility
ER  -