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Keywords: Geology of Wisconsin BHL19735248.jpg Geology of Wisconsin Survey of 1873-1879 19735248 64751 23664 Table of Contents 2 http //www biodiversitylibrary org/page/19735248 10 5962/bhl title 23664 Geological and Natural History Survey Wis NOT_IN_COPYRIGHT<br> Biodiversity Heritage Library Check categories 2015 November 6 PD-old-70-1923 Geology of Wisconsin Survey of 1873-1879 Images uploaded by Fæ Files from the Biodiversity Heritage Library |