@book{26554,
	author = {Knappen, Russell Stafford,},
	title = {Geology and mineral resources of the Dixon quadrangle,},
	publisher = {[Schnepp & Barnes, printers, Springfield]},
	year = {1926.},
	series = {Illinois. State geological survey. Bulletin},
	address = {Urbana, Ill.},
	note = {At head of title: State of Illinois. Department of registration and education. Division of the State geological survey.}
}