@article {1492,
	title = {Bericht {\"u}ber die Leistungen in der Naturgeschichte der Mollusken w{\"a}hrend des Jahres 1867},
	journal = {Archiv f{\"u}r Naturgeschichte},
	volume = {34},
	year = {1868},
	month = {109-158},
	pages = {2},
	chapter = {109},
	url = {http://www.biodiversitylibrary.org/page/7068039$\#$page/140/mode/1up},
	author = {Troschel, C.M.}
}
@book {686,
	title = {Monographia Pneumonopomorum viventium, accedente fossilium enumeratione. Supplementum tertium. Monographiae Auriculaceorum. Parte secunda auctum},
	volume = {4},
	year = {1876},
	pages = {479 pp.},
	publisher = {Cassellis},
	organization = {Cassellis},
	author = {L. Pfeiffer}
}
@book {687,
	title = {part I Gastropoda : Pulmonata and Prosobranchia-Neurobranchia},
	series = {Hand list of Mollusca in the Indian Museum, Calcutta},
	volume = {1},
	year = {1878},
	pages = {338},
	publisher = {Calcutta},
	organization = {Calcutta},
	url = {http://www.biodiversitylibrary.org/item/65172$\#$page/304/mode/1up},
	author = {G. Nevill}
}
@article {67,
	title = {Catalogue des esp{\`e}ces appartenant au genre Opisthostoma, Blanford.},
	journal = {Journal de conchyliologie},
	volume = {27},
	year = {1879},
	pages = {193-198},
	chapter = {193},
	url = {http://www.biodiversitylibrary.org/item/54087$\#$page/209/mode/1up},
	author = {H. Crosse}
}
@book {bhl100489,
	title = {Structural and systematic conchology: an introduction to the study of the Mollusca...},
	volume = {2},
	year = {1883},
	note = {http://www.biodiversitylibrary.org/bibliography/10347},
	pages = {430},
	publisher = {Philadelphia :The author,},
	organization = {Philadelphia :The author,},
	keywords = {Mollusks|},
	url = {http://www.biodiversitylibrary.org/page/32229510$\#$page/613/mode/1up},
	author = {Tryon, George W.}
}
@article {73,
	title = {Nouvelles contributions malacologiques},
	journal = {Bulletins de la Soci{\'e}t{\'e} Malacologique de France},
	volume = {4},
	year = {1887},
	pages = {273-288},
	chapter = {273},
	url = {http://www.biodiversitylibrary.org/item/54677$\#$page/303/mode/1up},
	author = {C.F. Ancey}
}
@article {688,
	title = {Catalog der gegenw{\"a}rtig lebend bekannten Pneumonopomen},
	journal = {Nachrichtsblatt der Deutschen Malakozoologischen Gesellschaft},
	volume = {30},
	year = {1898},
	chapter = {134},
	url = {http://biodiversitylibrary.org/item/89671$\#$page/336/mode/1up},
	author = {W. Kobelt and O. von Moellendorff}
}
@book {689,
	title = {Cyclophoridae},
	series = {Das Tierreich},
	volume = {16},
	year = {1902},
	pages = {662},
	publisher = {R. Friedl{\"a}nder und Sohn},
	organization = {R. Friedl{\"a}nder und Sohn},
	address = {Berlin},
	url = {http://biodiversitylibrary.org/item/16047$\#$page/456/mode/1up},
	author = {W. Kobelt}
}
@article {45,
	title = {The Malayan species of Opisthostoma (Gastropoda, Probranchia, Cyclophoridae), with a catalogue of all the species hitherto described},
	journal = {The Bulletin of the Raffles Museum},
	volume = {24},
	year = {1952},
	pages = {5-61},
	chapter = {5},
	url = {http://rmbr.nus.edu.sg/rbz/biblio/24/24brm005-062.pdf},
	author = {van Benthem-Jutting, W.S.S.}
}
