@book{27687,
	author = {Weller, J. Marvin and Ekblaw, George E.},
	title = {Preliminary geological map of parts of the Alto Pass, Jonesboro, and Thebes Quadrangles, Union, Alexander, and Jackson counties.},
	year = {1940.},
	address = {Urbana, Ill.,},
	note = {At head of title: State of Illinois ... Department of registration and education ... Division of the State geological survey ...}
}