| OFR43 Results of Trenching Investigations Along the New Castle Railroad Survey-1 Seismic Line, New Castle, Delaware |
McLaughlin, P.P., Baxter, S.J., Ramsey, K.W., McKenna, T.E., Strohmeier, S.A. |
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| OFR17 A Guide to Information on Benchmarks in Delaware |
Schenck, W.S. |
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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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