| OFR25 Saturated Thickness of the Columbia Formation in Southern New Castle County, Delaware |
Groot, J.J., Demicco, P.M., Cherry, P.J. |
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| B11 Ground-Water Resources of Southern New Castle County Delaware |
Rima, D.R., Coskery, O.J., Anderson, P.W. |
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| B8 Water Resources of Sussex County, Delaware |
Rasmussen, W.C., Wilkens, R.A., Beall, R.M. |
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| B2 Geology and Ground-Water Resources of the Newark Area, Delaware with a Section on the Surface Water Resources |
Groot, J.J., Rasmussen, W.C., Hulme, A.E. |
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