1953. 2018-04-16T18:31:58Z. 2018-04-16T18:31:58Z. Amsden, Thomas William. Dept. of Geology, Mines and Water Resources. English. cartographic image. Public. Maryland, Garrett County, Garrett County (Md.), and Garrett County.
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1940. 2018-05-17T18:26:48Z. 2018-05-17T18:26:48Z. Cloos, Ernst, 1898-1974. Maryland Geological Survey. English. cartographic image. Public. Maryland, Howard County, Howard County (Md.), and Howard County.
1953. 2018-04-16T18:03:32Z. 2018-04-16T18:03:32Z. Maryland. Department of Geology, Mines, and Water Resources. The Dept. English. cartographic image. Public. Maryland, Montgomery County, Washington (D.C.), and Montgomery County.
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.
1990. 2002-06-01T04:00:00Z. 2002-06-01T04:00:00Z. Geological Survey (U.S.). The Survey ; Books and Open-File Section, distributor. English. Public. Virginia, Fairfax County, Arlington County, Maryland, Montgomery County, Prince George's County, and Washington (D.C.).
1997. 2002-06-01T04:00:00Z. 2012-07-17T19:15:35Z. Geological Survey (U.S.). The Survey ; For sale by Information Services. English. Public. Virginia, Fairfax County, Arlington County, Falls Church, Maryland, and Montgomery County.
2000. 2002-06-01T04:00:00Z. 2016-03-07T18:21:32Z. Geological Survey (U.S.). The Survey ; Information Services [distributor]. English. Public. Virginia, Fredericksburg Region, Maryland, and Charles County.
1998. 2012-07-20T19:55:08Z. 2012-07-20T19:55:08Z. Drake, Avery Ala, 1927-. The Survey ; For sale by Information Services. English. Public. Maryland and Montgomery County.
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