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1988. 2016-06-07T18:15:26Z. 2016-08-20T21:14:18Z. Brezinski, David K. Maryland Geological Survey. English. cartographic image. Public. Maryland, Allegany County, Garrett County, Avilton Region, Frostburg Region, U.S., Allegany County., and Garrett County.
1978. 2014-01-17T20:26:18Z. 2014-01-31T23:13:19Z. Fisher, George Wescott, 1937-. The Survey. English. Public. Maryland, Carroll County, and U.S.
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