@book{27694,
	author = {Stout, Wilber, and Geological Survey of Ohio.},
	title = {Marl, tufa rock, travertine, and bog ore in Ohio /},
	editor = {Danner Press)},
	publisher = {Geological Survey of Ohio,},
	year = {1940},
	series = {Bulletin ;},
	address = {Columbus, Ohio :}
}