| GM24 Geologic Map of the Millington, Clayton and Smyrna Quadrangles, Delaware |
Ramsey, K.W., Tomlinson, J.L. |
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| GM13 Geologic Map of New Castle County, Delaware |
Ramsey, K.W. |
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| HM6 Geohydrology of the Chesapeake and Delaware Canal Area, Delaware |
Woodruff, K.D. |
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| GM 6 Geology of the Dover Area, Delaware |
Pickett, T.E., Benson, R.N. |
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| GM 5 Geology of the Smyrna-Clayton Area, Delaware |
Pickett, T.E., Benson, R.N. |
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| GM 2 Geology of the Middletown-Odessa Area, Delaware |
Pickett, T.E., Spoljaric, N. |
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