@article {717,
	title = {The Pomacea flagellata complex in Central America},
	journal = {Journal of Conchology},
	volume = {25},
	year = {1964},
	pages = {224-23, pl. 13},
	author = {Pain, T.}
}
@article {635,
	title = {The recent Mollusca of Augustus Addison Gould},
	journal = {United States National Museum Bulletin},
	volume = {239},
	year = {1964},
	pages = {182 pp., 45 pls},
	author = {Johnson, R. I.}
}
@article {679,
	title = {The recent Mollusca of Augustus Addison Gould},
	journal = {United States National Museum Bulletin},
	volume = {239},
	year = {1964},
	pages = {182 pp., 45 pls},
	author = {Johnson, R. I.}
}
@article {541,
	title = {Type land snails in the Academy of Natural Sciences of Philadelphia. Part III. Limnophile and thalassophile Pulmonata. Part IV. Land and fresh-water Prosobranchia},
	journal = {Proceedings of the Academy of Natural Sciences of Philadelphia},
	volume = {116},
	year = {1964},
	pages = {149-193},
	author = {Baker, H.B.}
}
