@book{29689,
	author = {Perkins, Ronald D. and Perry, Thomas G.},
	title = {Some bryozoans from the Beil Limestone Member of the Lecompton Limestone (Virgilian) of Kansas /},
	publisher = {s.n.],},
	year = {1962.},
	series = {Kansas. State Geological Survey. Bulletin},
	address = {[Lawrence :}
}