1973. 2012-02-22T20:49:40Z. 2015-10-21T15:30:43Z. United States. Army Map Service. Interior--Geological Survey. English. Public. Maine.
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1973. 2012-02-22T19:49:29Z. 2015-10-21T15:30:43Z. United States. Army Map Service. Interior--Geological Survey. English. Public. Michigan and Wisconsin.
1973. 2012-02-22T20:14:59Z. 2015-10-21T15:30:43Z. United States. Army Map Service. Interior--Geological Survey. English. Public. New York (State) and Ontario.