| RI78 Subsurface Geology of the Area Between Wrangle Hill and Delaware City, Delaware |
Jengo, J.W., McLaughlin, P.P., Ramsey, K.W. |
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| OFR19 Regolith Thickness of the Delaware Piedmont |
Woodruff, K.D., Christopher, M.J. |
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| RI7 An Invertebrate Macrofauna from the Upper Cretaceous of Delaware |
Shapiro, E., Richards, H.G. |
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| B6 The Water Resources of Northern Delaware |
Rasmussen, W.C., Groot, J.J., Martin, R.O.R., McCarren, E.F., Behn, V.C. |
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| B3 Marine Upper Cretaceous Formations of the Chesapeake and Delaware Canal |
Organist, D.M., Richards, H.G., Groot, J.J. |
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