@book{26871,
	author = {Condra, Geo. E.},
	title = {Deep wells of Nebraska,},
	publisher = {Printed by authority of the state of Nebraska,},
	year = {1931.},
	series = {Nebraska.  Geological survey.  Bulletin 4, second ser.},
	address = {[Lincoln]},
	note = {At head of title: The University of Nebraska.}
}