| GM24 Geologic Map of the Millington, Clayton and Smyrna Quadrangles, Delaware |
Ramsey, K.W., Tomlinson, J.L. |
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| GM14 Geologic Map of Kent County, Delaware |
Ramsey, K.W. |
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| GM13 Geologic Map of New Castle County, Delaware |
Ramsey, K.W. |
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| RI55 Geology of the Milford and Mispillion River Quadrangles |
Ramsey, K.W., Groot, J.J. |
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| GM 8 Geology of the Milford and Mispillion River Quadrangles, Delaware |
Ramsey, K.W. |
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| OFR13 Delaware's Extractive Mineral Industry |
Doyle, R.G., Pickett, T.E. |
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| OFR8 Guidebook: Columbia Deposits of Delaware |
Jordan, R.R., Talley, J.H. |
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| B14 Hydrology of the Columbia (Pleistocene) Deposits of Delaware: An Appraisal of a Regional Water-Table Aquifer |
Johnston, R.H. |
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| B13 Geology, Hydrology, and Geophysics of Columbia Sediments in the Middletown-Odessa Area, Delaware |
Spoljaric, N., Woodruff, K.D. |
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| B12 Columbia (Pleistocene) Sediments of Delaware |
Jordan, R.R. |
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