@book{29052,
	author = {Merriam, Daniel Francis. and Atkinson, William R.,},
	title = {Simpson filled sinkholes in eastern Kansas /},
	publisher = {[s.n.],},
	year = {1956.},
	series = {Kansas. State Geological Survey. Bulletin 119, pt. 2. Reports of studies, 1956, pt. 2},
	address = {Lawrence :},
	note = {University of Kansas publication.}
}