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@book {575,
	title = {Catalogue of the Mollusca in the collection of the British Museum, 2},
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@article {565,
	title = {Report on the scientific results of the voyage of H.M.S. Challenger during the years 1872-76, Under the command of captain sir george s. nares and captain frank tourle thomson},
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	publisher = {H.M. Stationary Office},
	author = {P. Pelseneer}
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	title = {A zoogeographic and taxonomic review of euthecosomatous pteropoda},
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	title = {Euthecosomata, a group with remarkable developmental stages (Gastropoda, Pteropoda)},
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}
