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By: Simpson, Charles TType: ArticleIn: Proceedings of the United States National MuseumVolume: 18Series:Issue: 1068Date: 1896Page Range: 295--343Publication Info: Washington Smithsonian Institution Press, [etc.]Subjects:
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By: Simpson, Charles TType: ArticleIn: Proceedings of the Academy of Natural Sciences of PhiladelphiaVolume: 52Series:Issue:Date: 1900Page Range: 74--86Publication Info: Philadelphia, Academy of Natural Sciences of Philadelphia,Subjects:
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By: Simpson, Charles TType: ArticleIn: Proceedings of the United States National MuseumVolume: 15Series:Issue: 911Date: 1892Page Range: 405--436Publication Info: Washington Smithsonian Institution Press, [etc.]Subjects: