@article {27181,
	title = {Occurrence and significance of the Arctic Arkelloceras in the Middle Bajocian of the Alberta Foothills (Ammonitina, Jurassic)},
	volume = {38},
	year = {1964},
	pages = {405-409},
	publisher = {Journal of Paleontology},
	author = {Westermann, G. E. G.}
}
