@book{26205,
	author = {Butts, Charles,},
	title = {The Mississippian series of eastern Kentucky.},
	publisher = {The Kentucky Geological Survey,},
	year = {1922.},
	series = {Kentucky. Geological Survey, 1920-1932. ser. 6. [Geologic reports]},
	address = {Frankfort, Ky.,},
	edition = {1st ed. ...}
}