@book{27246,
	author = {Voskuil, Walter Henry,},
	title = {The competitive position of Illinois coal in the Illinois coal market area},
	publisher = {Printed by authority of the state of Illinois,},
	year = {1936.},
	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.}
}