@book{26604,
	author = {Culver, Harold Eugene,},
	title = {Present status of correlation of Illinois coals,},
	publisher = {Jeffersons Printing & Stationery Co.]},
	year = {1927.},
	address = {Urbana, Ill.},
	note = {At head of title: State of Illinois. Department of registration and education. Division of the State Geological Survey.}
}