1954. 2011-04-01T17:05:34Z. 2012-02-14T00:23:40Z. Cornwall, Henry Rowland, 1913-. U.S. Geological Survey. English. Public. Michigan and Keweenaw County.
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1954. 2011-11-30T16:14:07Z. 2012-03-05T17:17:43Z. Cornwall, Henry Rowland, 1913-. U.S. Geological Survey. English. Public. Michigan and Keweenaw County.
1954. 2011-11-29T21:36:19Z. 2012-03-05T17:16:47Z. Cornwall, Henry Rowland, 1913-. U.S. Geological Survey. English. Public. Michigan and Keweenaw County.
1954. 2011-12-12T21:29:26Z. 2022-03-29T20:39:43Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Michigan.
1954. 2011-11-30T16:11:43Z. 2018-03-27T17:31:57Z. Geological Survey (U.S.). The Survey. English. Public. Michigan and U.S.
1954. 2011-04-01T17:08:00Z. 2012-02-14T00:23:40Z. Geological Survey (U.S.). The Survey. English. Public. Michigan.
7. Gwinn, Mich
1954. 2011-12-12T21:29:28Z. 2022-03-29T20:39:44Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Michigan.
1954. 2011-12-12T21:29:30Z. 2022-03-29T20:39:44Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Michigan.
1954. 2011-12-12T21:29:33Z. 2022-03-29T20:39:44Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Michigan.
1954. 2011-12-12T21:29:38Z. 2022-03-29T20:39:45Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Michigan.