@book{30196,
	author = {Bergström, Stig M. and Sweet, Walter C.,},
	title = {Conodonts from the Lexington limestone (Middle Ordovician) of Kentucky and its lateral equivalents in Ohio and Indiana,},
	publisher = {Paelontological Research Institution,},
	year = {1966.},
	address = {Ithaca, N.Y.,}
}