@article {750,
	title = {On Pomacea Perry (Ampullariidae)},
	journal = {The Nautilus},
	volume = {41},
	year = {1927},
	pages = {63-64},
	author = {Pilsbry, H. A.}
}
@article {747,
	title = {The case of Paludina multilineata Say},
	journal = {The Nautilus},
	volume = {67},
	year = {1953},
	pages = {58-61},
	author = {Pilsbry, H. A.}
}
@article {745,
	title = {A Colombian Pomacea of the Effusa group},
	journal = {The Nautilus},
	volume = {66},
	year = {1953},
	pages = {98-99, pl. 6, fig. 6},
	author = {Pilsbry, H. A. and Olsson, A. A.}
}
