@book{30373,
	author = {Yochelson, Ellis L. and Saunders, Burnett W.,},
	title = {A bibliographic index of North American late Paleozoic Hyolitha, Amphineura, Scaphopoda, and Gastropoda;},
	publisher = {U.S. Govt. Print. Off.,},
	year = {1967.},
	series = {United States. Geological Survey. Bulletin},
	address = {Washington,}
}