@article {495,
	title = {On the land and freshwater shells of Perak},
	journal = {Proceedings of the Zoological Society of London},
	volume = {1891},
	year = {1891},
	pages = {330-348},
	chapter = {330},
	url = {http://www.biodiversitylibrary.org/item/97151$\#$432},
	author = {O. F. von Moellendorff}
}
