Browsing Maryland State, County and Baltimore City Atlases by Subject "Bel Air (Md.)-- Maps"
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(Baltimore: Department of Natural Resources, Maryland Geological Survey, 1977)Quadrangle Atlas No. 6. Includes Sheets: Map 1. Depth to Water Table (WT). Map 2. Slope of the Land Surface (SLOPE). Map 3. Ground-Water Availability (GW). Map 4. Constraints to Installation of Septic Systems (SS).