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Digital engineering aspects of karst map, a GIS version of Davies, W.E., Simpson, J.H., Ohlmacher, G.C., Kirk, W.S., and Newton, E.G., 1984, Engineering aspects of karst, U.S. Geological Survey, National atlas of the United States of America, scale 1:7,500,000 [electronic resource] / by B.D. Tobin and D.J. Weary ; U.S. Department of the Interior, U.S. Geological Survey. |
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