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Owen, David Dale, 1807-1860 / Illustrations to the geological report of Wisconsin, Iowa, and Minnesota
(1852)
Norwood, J. G.
Geological map of parts of Minnesota and Wisconsin designed to show portions of the rock formations
Based on date of publication, this material is presumed to be in the public domain.| For information on re-use see: http://digital.library.wisc.edu/1711.dl/Copyright




