@BOOK {KANG:1995c,
title = {Fertilizers; definitions and calculations: IITA research guide, No. 24},
author = {Kang, B. T. },
series = {IITA research guide, No. 24},
year = {1995},
month = {July},
publisher = {International Institute of Tropical Agriculture (IITA)},
address = {Ibadan, Nigeria},
note = {28p.},
}