Não informado. (1900). Bulletin of the Wisconsin Natural History Society. Wisconsin Natural History Society.
Chicago-referens (17:e uppl.)Não informado. Bulletin of the Wisconsin Natural History Society. Milwaukee, Wis: Wisconsin Natural History Society, 1900.
MLA-referens (8:e uppl.)Não informado. Bulletin of the Wisconsin Natural History Society. Wisconsin Natural History Society, 1900.
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