@book {272,
	title = {Report on the Invertebrata of Massachusetts, Comprising the Mollusca, Crustacea, Annelida, and Radiata},
	year = {1841},
	publisher = {Folsom, Wells, and Thurston},
	organization = {Folsom, Wells, and Thurston},
	address = {Cambridge, MA},
	author = {Gould, AA}
}
@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}
}
@book {218,
	title = {The Eastern Land Snails},
	year = {1962},
	publisher = {Wm. C. Brown Company Publishers},
	organization = {Wm. C. Brown Company Publishers},
	address = {Dubuque, Iowa},
	author = {Burch, J.B.}
}
@book {223,
	title = {Colored Illustrations of the Land Snails of Japan},
	year = {1982},
	publisher = {Hoikusha Publishing Co., Inc.},
	organization = {Hoikusha Publishing Co., Inc.},
	address = {Osaka},
	author = {Azuma, M}
}
@book {67,
	title = {Land Snails and Slugs of Russia and Adjacent Countries},
	year = {2009},
	publisher = {Pensoft},
	organization = {Pensoft},
	address = {Sofia},
	author = {Sysoev, A and Schileyko, A}
}
