@book{26645,
	author = {Root, Towner Bowditch,},
	title = {The oil and gas resources of the Ava-Campbell Hill area,},
	publisher = {Printed by authority of the state of Illinois,},
	year = {1928.},
	address = {Urbana, Ill.,},
	note = {At head of title: State of Illinois. Department of Registration and Education. Division of the State Geological Survey.}
}