1934. 2012-03-30T14:05:16Z. 2015-10-21T15:21:47Z. U.S. Lake Survey. U.S. Lake Survey Office. English. Public. Mackinac, Straits of (Mich.), Michigan, and Mackinac, Straits of.
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1932. 2012-03-26T20:37:47Z. 2015-10-21T15:21:44Z. U.S. Lake Survey. On sale at U.S. Lake Survey Office. English. Public. Mackinac, Straits of (Mich.), Michigan, Mackinac, Straits of., and Mackinac Island (Mich.).