First biennial report of the progress of the Geological survey of Michigan, - Softcover

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This book is a reproduction of a volume found in the collection of the University of Michigan Library. It is produced from digital images created through the Library's large-scale digitization efforts. The digital images for this book were cleaned and prepared for printing through automatic processes. Despite the cleaning process, occasional flaws may still be present that were part of the original work itself, or introduced during digitization.

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