@book{27827,
	author = {Easton, William Heyden,},
	title = {Pitkin limestone of northern Arkansas,},
	year = {1942.},
	series = {Arkansas. Geological Survey, 1923-      Bulletin 8},
	address = {Little Rock,},
	note = {At head of title: State of Arkansas. Arkansas Geological Survey, Richard J. Anderson, acting state geologist.}
}