TY  - BOOK
AU  - Havlin Et Al, John L
TI  - Soil Fertility And Fertilizers: An Introduction To Nutrient Management
SN  - 81 7808 863 0
U1  - 631.422 
PY  - 2004///
CY  - 
PB  - Pearson Education
KW  - Soil Fertility
ER  -