@article {40027,
	title = {Stratigraphically significant Early and Middle Ordovician gastropod occurrences, western and northwestern Canada},
	volume = {69},
	year = {1995},
	pages = {1047-1053},
	publisher = {Journal of Paleontology},
	author = {Rohr, David M. and Norford, B. S. and Yochelson, Ellis L.}
}
