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    • Manchester Quadrangle Hydrogeologic Atlas 

      Otton, Edmond G. (Baltimore: Department of Natural Resources, Maryland Geological Survey, 1981)
      Quadrangle Atlas No. 15. Includes Sheets: Map 1. Slope of the Land Surface (SLOPE). Map 2. Locations of Wells, Springs and Test Holes (WS). Map 3. Depth to the Water Table (WT). Map 4. Availability of Ground Water (GW). ...