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.
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2017. 2017-10-17T18:00:24Z. 2017-10-23T19:55:47Z. Geological Survey (U.S.), cartographer. U.S. Department of the Interior, U.S. Geological Survey,For sale by U.S. Geological Survey, Information Services. English. cartographic image. Public. Arizona and Pima County.
1981. 2016-06-21T13:27:53Z. 2016-09-26T17:42:51Z. Duigon, Mark T. State of Md., Dept. of Natural Resources, Md. Geological Survey. English. cartographic image. Public. Maryland and Hampstead Region.
1983. 2016-06-21T14:06:25Z. 2016-09-26T17:42:51Z. Duigon, Mark T. State of Md., Dept. of Natural Resources, Md. Geological Survey. English. cartographic image. Public. Maryland and Ellicott City Region.
1981. 2016-06-21T13:59:06Z. 2016-09-26T17:42:51Z. Williams, James Frank, 1944-. Md. Geological Survey. English. cartographic image. Public. Maryland and Finksburg Region.
1981. 2016-06-21T13:39:10Z. 2016-09-26T17:42:51Z. Otton, E. G. (Edmond George), 1918-. Md. Geological Survey. English. cartographic image. Public. Maryland and Manchester Region.
1983. 2016-06-21T14:02:17Z. 2016-09-26T17:42:51Z. Duigon, Mark T. State of Md., Dept. of Natural Resources, Md. Geological Survey. English. cartographic image. Public. Pennsylvania, New Freedom Region, Maryland, and Parkton Region.
1981. 2016-06-21T13:34:08Z. 2016-09-26T17:42:51Z. Duigon, Mark T. State of Md., Dept. of Natural Resources, Md. Geological Survey. English. cartographic image. Public. Maryland and Lineboro Region.
1981. 2016-06-21T13:35:44Z. 2016-09-26T17:42:51Z. Weigle, James M. (James Montgomery), 1919-1994. Dept. of Natural Resources, Md. Geological Survey. English. cartographic image. Public. Pennsylvania, Littlestown Region, Maryland, and Silver Run Region.
1985. 2002-06-01T04:00:00Z. 2023-10-11T03:01:27Z. Geological Survey (U.S.). The Survey : [Books and Open-File Reports Section, distributor]. English. cartographic image. Public. Oklahoma and Colorado.