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.
1955. 2011-04-11T17:36:25Z. 2012-02-13T19:41:27Z. Cornwall, Henry Rowland, 1913-. U.S. Geological Survy. English. Public. Michigan and Keweenaw County.
5. Geologic map of the Manitou Island quadrangle, Michigan bedrock geology / [cartographic material]
1955. 2011-04-11T17:30:33Z. 2012-02-13T19:41:27Z. Cornwall, Henry Rowland, 1913-. U.S. Geological Survey. English. Public. Michigan and Keweemaw County.
