TY  - BOOK
AU  - John L Havlin
TI  - Soil Fertility and Fertilizers 
SN  - 9788120330177
U1  - 631.81  J 6131 S 
PY  - 2012///
CY  - New Delhi
PB  - PHI, Learning Pvt. Ltd. 
KW  - Fertilizers
ER  -