@book {113,
	title = {Land Mollusca of North America north of Mexico},
	series = {The Academy of Natural Sciences of Philadelphia Monograph},
	volume = {3},
	number = {2},
	year = {1948},
	pages = {748-770},
	author = {Pilsbry, HA}
}
@article {487,
	title = {Identification Guide to Land Snails and Slugs of Western Washington},
	year = {2004},
	url = {http://academic.evergreen.edu/projects/ants/TESCBiota/mollusc/key/webkey.htm},
	author = {William P. Leonard and Casey H. Richart and Timothy A. Pearce and Paul A. Hohenlohe}
}
