@article {227,
	title = {On the land-shells of the Natuna Islands},
	journal = {The annals and magazine of natural history, including zoology, botany and geology},
	volume = {6},
	year = {1894},
	pages = {453-463},
	chapter = {453},
	url = {http://www.biodiversitylibrary.org/item/63421$\#$page/508/mode/1up},
	author = {E.A. Smith}
}
@book {548,
	title = {Manual of conchology, structural and systematic : with illustrations of the species. by George W. Tryon, Jr. Second series, Pulmonata},
	volume = {24},
	number = {2},
	year = {1916},
	pages = {380},
	address = {Philadelphia},
	url = {http://www.biodiversitylibrary.org/item/76601$\#$228},
	author = {G.W. Tryon},
	editor = {H.A. Pilsbry}
}
@book {548,
	title = {Manual of conchology, structural and systematic : with illustrations of the species. by George W. Tryon, Jr. Second series, Pulmonata},
	volume = {23},
	number = {2},
	year = {1915},
	pages = {380},
	address = {Philadelphia},
	url = {http://www.biodiversitylibrary.org/item/16731$\#$page/169/mode/1up},
	author = {G.W. Tryon},
	editor = {H.A. Pilsbry}
}
