Academy of Natural Sciences of Philadelphia. Proceedings of the Academy of Natural Sciences of Philadelphia. Academy of Natural Sciences of Philadelphia].
Chicago-referens (17:e uppl.)Academy of Natural Sciences of Philadelphia. Proceedings of the Academy of Natural Sciences of Philadelphia. [Philadelphia: Academy of Natural Sciences of Philadelphia].
MLA-referens (8:e uppl.)Academy of Natural Sciences of Philadelphia. Proceedings of the Academy of Natural Sciences of Philadelphia. Academy of Natural Sciences of Philadelphia].
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