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Start Over Subjects Geologic Sediments ✖Remove constraint Subjects: Geologic Sediments Subjects Mollusca -- classification ✖Remove constraint Subjects: Mollusca -- classification Titles Extracts from the Proceedings of the Academy of Natural Sciences of Philadelphia, of papers ✖Remove constraint Titles: Extracts from the Proceedings of the Academy of Natural Sciences of Philadelphia, of papers

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  • Extracts from the Proceedings of the Academy of Natural Sciences of Philadelphia, of papers1