@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 {240,
	title = {The Slug Fauna of the USSR and Adjacent Countries (Gastropoda Terrestria Nuda)},
	series = {Fauna SSSR, Molljuskii},
	volume = {3},
	number = {122},
	year = {1980},
	pages = {437},
	publisher = {Akademii Nauk SSSR, Zoologicheskii Institut},
	organization = {Akademii Nauk SSSR, Zoologicheskii Institut},
	address = {Leningrad},
	author = {Likharev, IM and Wiktor, A}
}
@book {42,
	title = {Land Snails of Britain and North-West Europe},
	year = {1979},
	publisher = {Harper Collins Publishers},
	organization = {Harper Collins Publishers},
	address = {Hong Kong},
	author = {Kerney, MP and Cameron, RAD}
}
@book {870,
	title = {Die Landschnecken Nord- und Mitteleuropas},
	year = {1983},
	publisher = {Ein Bestimmungsbuch fur Biologen und Naturfreunde},
	organization = {Ein Bestimmungsbuch fur Biologen und Naturfreunde},
	address = {Berlin.},
	author = {Kerney, MP and Cameron, RAD and Jungbluth, J.H.}
}
@book {745,
	title = {Gastropoda Pulmonata},
	series = {Checklist delle specie della fauna italiana},
	year = {1995},
	pages = {1-60},
	publisher = {Calderini},
	organization = {Calderini},
	address = {Bologna, Italy},
	author = {Manganelli, G and Bodon, M and Favilli, L and Giusti, F},
	editor = {A Minelli and S Ruffo and S La Posta}
}
@book {705,
	title = {Fauna Graeciae VIII: The slugs of Greece (Arionidae, Milacidae, Limacidae, Agriolimacidae - Gastropoda, Stylommatophora)},
	year = {2001},
	publisher = {Natural History Museum of Crete, University of Crete},
	organization = {Natural History Museum of Crete, University of Crete},
	address = {Irakleio},
	author = {Wiktor, A}
}
@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}
}
@book {151,
	title = {Land Snails of the Land of Israel: Natural History and a Field Guide},
	year = {2009},
	publisher = {Pensoft},
	organization = {Pensoft},
	address = {Sofia, Moscow},
	author = {Heller, J}
}
@book {128,
	title = {The Introduced Terrestrial Mollusca of South Africa},
	series = {SANBI Biodiversity Series},
	volume = {15},
	year = {2010},
	author = {Herbert, DG}
}
@book {68,
	title = {Turkish Land Snails},
	year = {2010},
	publisher = {Verlag Natur \& Wissenschaft},
	organization = {Verlag Natur \& Wissenschaft},
	edition = {5th},
	address = {Solingen},
	author = {Sch{\"u}tt, H}
}
