@book {529,
	title = {Manual of conchology, structural and systematic : with illustrations of the species},
	volume = {2(9)},
	year = {1894},
	pages = {366},
	address = {Philadelphia},
	url = {http://www.biodiversitylibrary.org/item/76702$\#$page/370/mode/1up},
	author = {G.W. Tryon}
}
@article {221,
	title = {On the land-shells of the Sulu Archipelago},
	journal = {The annals and magazine of natural history, including zoology, botany and geology},
	volume = {13},
	year = {1894},
	pages = {48-60},
	chapter = {48},
	url = {http://www.biodiversitylibrary.org/item/63421$\#$page/71/mode/1up},
	author = {E.A. Smith}
}
