@book{26488,
	author = {Gould, Charles Newton, and Lonsdale, John T.},
	title = {Geology of Beaver county, Oklahoma, by Chas. N. Gould and John T. Lonsdale.},
	year = {1926.},
	series = {Oklahoma. Geological survey. Bulletin},
	address = {Norman,},
	note = {Map folded in pocket.}
}