@book{3618,
	author = {E.U.A. Soil Conservation Service and Cornell University. Ithaca, N.Y. Agronomy Department.},
	title = {Keys to soil taxonomy},
	publisher = {The Service,},
	year = {1987},
	series = {Technical monograph},
	address = {Ithaca, N.Y. :},
	edition = {3 rev. ed.}
}