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	title = {Catalogue of the superfamily Cancellarioidea Forbes and Hanley, 1851 (Gastropoda: Prosobranchia)},
	journal = {The Nautilus, Supplement},
	volume = {1},
	year = {1990},
	pages = {1-69},
	author = {Petit, R. E. and Harasewych, M. G.}
}
@article {557,
	title = {Chromosome analysis of apple snail Pomacea canaliculata},
	journal = {Tohuku Journal of Agricultural Research},
	volume = {40},
	year = {1990},
	pages = {81-89},
	author = {von Brand, E. and Yokasawa, T. and Fujio, Y.}
}
@article {660,
	title = {Reproduction of the golden apple snail (Ampullaridae [sic]): egg mass , hatching, and incubation},
	journal = {Philippine Journal of Science},
	year = {1990},
	pages = {95-105},
	author = {Lacanilao, F.}
}
@article {663,
	title = {Shell morphology, reproductive anatomy and genetic patterns of three species of apple snails of the genus Pomacea in Thailand.},
	journal = {Journal of Medical and Applied Malacology},
	volume = {2},
	year = {1990},
	pages = {46-62},
	author = {Keawjam, R. S. and Upatham, E. S.}
}
