Subject: Michigan Lower Pen - Yale University Library GeoBlacklight Search Results

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1. Bedrock geology of southern Michigan

1987. 2018-04-20T19:24:13Z. 2018-04-20T19:24:13Z. Milstein, Randall L. Michigan. Dept. of Natural Resources. English. cartographic image. Public. Michigan, U.S., and Michigan.

2. The centennial geological map of the southern peninsula of Michigan

1936. 2018-04-20T19:38:07Z. 2018-04-20T19:38:07Z. Martin, Helen M. (Helen Mandeville), 1889-1973. Geological Survey Division. English. cartographic image. Public. Michigan, U.S., Michigan., and États-Unis.