RI55 Geology of the Milford and Mispillion River Quadrangles |
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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RI11 An Evaluation of the Resistivity and Seismic Refraction Techniques in the Search for Pleistocene Channels in Delaware |
Bonini, W.E. |
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RI8 Evaluation of the Water Resources of Delaware |
Baker, W.W., Varrin, R.D., Groot, J.J., Jordan, R.R. |
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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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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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