@article {723,
	title = {Catalog and bibliography of the nonindigenous nonmarine snails and slugs of the Hawaiian Islands},
	journal = {Bishop Museum Occasional Papers},
	volume = {50},
	year = {1997},
	pages = {1-66},
	author = {Cowie, Robert H}
}
@article {722,
	title = {Pila R{\"o}ding, 1798 and Pomacea Perry, 1810 (Mollusca, Gastropoda): proposed placement on the Official List, and Ampullariidae Gray, 1824: proposed confirmation as the nomenclaturally valid synonym of Pilidae Preston, 1915},
	journal = {Bulletin of Zoological Nomenclature},
	volume = {54},
	year = {1997},
	pages = {83-88},
	author = {Cowie, Robert H}
}
