John L Havlin. (2014). Soil fertility and fertilizers: An introduction to nutrient management (8.). PHI learning pvt. ltd.
Chicago Edition CitationJohn L Havlin. Soil Fertility and Fertilizers: An Introduction to Nutrient Management. 8. New Delhi: PHI learning pvt. ltd, 2014.
MLA Edition CitationJohn L Havlin. Soil Fertility and Fertilizers: An Introduction to Nutrient Management. 8. PHI learning pvt. ltd, 2014.
Warning: These citations may not always be 100% accurate.