@book{27800,
	author = {Tullis, Edward Langdon,},
	title = {Magnetometer surveys during 1941,},
	publisher = {University of South Dakota,},
	year = {1942.},
	series = {South Dakota. State Geological Survey. Report of investigations,},
	address = {Vermillion, S.D.,},
	note = {At head of title: State of South Dakota, Harlan J. Bushfield, Governor. State Geological Survey, E. P. Rothrock, State Geologist.}
}