@book{82411,
	author = { P.N.Takkar, I.M.Chhibba and S.K.Mehta.},
	title = {Twenty years of Coordinated research on micronutrients in soils and plants 1967-87.},
	publisher = {Indian Institute of Soil Science},
	year = {1989},
	series = {IISS Bulletin, 1},
	address = {Bhopal}
}