@book{10123,
	author = {Follett, Ronald F. and Cruse, R. M.},
	title = {Managing nitrogen for groundwater quality and farm profitability},
	publisher = {Soil Science Society of America,},
	year = {1991},
	address = {Madison, Wis. :},
	note = {Incluye 4 discos flexibles, 3 de 5 1/4, 1 de 3 1/2}
}