@article {783,
	title = {On Pomacea sordida (Swainson, 1823) (Prosobranchia, Ampullariidae)},
	journal = {Mem{\'o}rias do Instituto Oswaldo Cruz},
	volume = {84},
	year = {1989},
	pages = {351-355},
	author = {Thiengo, Silvana C}
}
@article {547,
	title = {Comparative conchology and functional morphology of the copulatory organ of the Ampullariidae (Gastropoda, Monotocardia) and their bearing upon phylogeny and palaeontology.},
	journal = {Abhandlungen des Naturwissenschaftlichen Vereins in Hamburg},
	volume = {NF},
	year = {1989},
	pages = {141-164},
	author = {Berthold, T}
}
@inbook {563,
	title = {Control stragey for the introduced snail Pomacea lineata, in rice paddy},
	booktitle = {Slugs and Snails in World Agriculture, British Crop Protection Council Monograph 41},
	year = {1989},
	pages = {69-75},
	author = {Cheng, E. Y.},
	editor = {Henderson, I.F.}
}
@article {562,
	title = {The date of publication of Anton{\textquoteright}s "Verzeichniss der Conchylien"},
	journal = {The Veliger},
	volume = {20},
	year = {1989},
	pages = {299},
	author = {Cernohorsky, W.O.}
}
