1973. 2016-06-07T14:36:26Z. 2016-06-07T14:36:26Z. Glaser, John D. State of Md., Dept. of Natural Resources, Md. Geological Survey, Williams & Heintz Map Corp.). English. cartographic image. Public. Maryland and Bowie Region.
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1975. 2016-06-09T16:57:33Z. 2016-08-20T21:14:34Z. Maryland Geological Survey. State of Md., Dept. of Natural Resources, Md. Geological Survey, Williams & Heintz Map Corp.). English. cartographic image. Public. Maryland and Cockeysville Region.
1967. 2018-04-13T20:03:18Z. 2018-04-13T20:06:37Z. Maryland Geological Survey. The Survey. English. cartographic image. Public. Maryland, U.S., and Maryland.
1987. 2018-05-11T18:55:29Z. 2018-09-05T19:36:27Z. Fuller, H. Kit. Dept. of the Interior, U.S. Geological Survey. English. cartographic image. Public. Maryland, Delaware, Washington (D.C.), Delaware., and Maryland.
1956. 2018-04-16T18:11:28Z. 2018-04-16T18:11:28Z. Geological Survey (U.S.). The Dept. English. cartographic image. Public. Maryland, Allegany County, Allegany County (Md.), and Allegany County.
1938. 2018-04-16T17:53:08Z. 2020-10-13T22:38:22Z. Jonas, Anna I. (Anna Isabel), 1881-1974, author, cartographer. Maryland Geological Survey. English. cartographic image. Public. Maryland, Frederick County, Washington County, Carroll County, Carroll County., Frederick County., and Washington County.
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.
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.
