| RI58 The Pliocene and Quaternary Deposits of Delaware: Palynology, Ages, and Paleoenvironments |
Groot, J.J., Jordan, R.R. |
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| RI55 Geology of the Milford and Mispillion River Quadrangles |
Ramsey, K.W., Groot, J.J. |
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| RI53 Geology of the Seaford Area, Delaware |
Andres, A.S., Ramsey, K.W., Groot, J.J. |
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| RI50 Plant Microfossils of the Calvert Formation of Delaware |
Groot, J.J. |
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| RI3 Wells for the Observation of Chloride and Water Levels in Aquifers that Cross the Chesapeake and Delaware Canal |
Rasmussen, W.C., Groot, J.J., Beamer, N.H. |
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