01277nam a2200289 k 4500001001500000005001500015008004100030035002000071040001900091043001200110049002100122052002300143086002200166100003400188245012500222260017400347300003600521440007500557500003800632500002100670504002800691650005300719710004600772710006900818710004500887963005500932WMF000103380  20201124085048850510s1984    us ab    b    000   eng    a(OCoLC)12018378  aGIScGIS/dGPO  an-us-de0 lAV0000111210fXA06aI 19.42/4b84-4007  aI 19.42/4:84-40071 aMartin, Mary M.0KAC2020S074510aSimulated ground-water flow in the Potomac aquifers, New Castle County, Delaware/dy Mary M. Martin /dy Mary M. Martin   aTowson, Md.:bU.S. Dept. of the Interior, U.S. Geological Survey;aDenver, Colo.:bOpen-File Services Section, Western Distribution Branch, U.S. Geological Survey,c1984  avii, 85 p.:bill., maps;c28 cm00aU.S. Geological Survey water-resources investigations report;v84-4007  aOne map on folded leaf in pocket.  a"December 1984."  aBibliography: p. 84-85. 0aWater, UndergroundzDelawarezNew Castle County.  aCorps of Engineers (미국)0KAB202010831  aDelaware.bDept. of Natural Resources and Environmental Control.  aGeological Survey (미국)0KAB202010355  aWater,aUndergroundaDelawareaNewaCastleaCounty