@book{13364,
	author = {European Nitrogen Service programme, New Delhi. and Tandon, H. L. S. ; Comp.},
	title = {NPK in Indian agriculture, 1971-1975; a bibliography of Nitrogen, Phosphorus, Potassium and related factors in crops, soils, fertilisers and manures},
	publisher = {The Auth.},
	year = {1978},
	address = {New Delhi}
}