| 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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| RI8 Evaluation of the Water Resources of Delaware |
Baker, W.W., Varrin, R.D., Groot, J.J., Jordan, R.R. |
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| RI6 Some Observations on the Sediments of the Delaware River South of Wilmington |
Jordan, R.R., Groot, J.J. |
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| B7 Engineering Materials of Northern New Castle County |
Ward, R.F., Groot, J.J. |
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| B5 Sedimentary Petrology of the Cretaceous Sediments of Northern Delaware in Relation to Paleogeographic Problems |
Groot, J.J. |
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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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