1934. 2012-03-29T18:56:02Z. 2015-10-21T15:21:46Z. U.S. Lake Survey. On sale at U.S. Lake Survey Office. English. Public. Les Cheneaux Islands (Mich.), Mackinac Island (Mich. : Island), Round Island (Mackinac County, Mich.), and Huron, Lake (Mich. and Ont.).
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1993. 2011-11-16T17:38:12Z. 2015-10-21T15:05:42Z. U.S. Coast and Geodetic Survey. The Survey. English. Public. Huron, Lake (Mich. and Ont.) and Les Cheneaux Islands (Mich.).