| SP16 Generalized Geologic Map of Delaware, Postcard |
DGS Staff |
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| SP23 Earthquake Basics |
Baxter, S.J. |
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| SP20 Delaware Piedmont Geology |
Plank, M.O., Schenck, W.S. |
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| B19 Geology and Hydrology of the Cockeysville Formation Northern New Castle County, Delaware |
Plank, M.O., Woodruff, K.D., Werkheiser, W.H. |
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| SP19 Delaware: Its Rocks, Minerals, and Fossils |
DGS Staff |
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| SP10 Selected Papers on the Geology of Delaware |
Jordan, R.R., Pickett, T.E., Kraft, J.C., Sheridan, R.E., Spoljaric, N., Thompson, A.M., Woodruff, K.D., Varrin, R.D., Leavens, P.B., Carey, W.L. |
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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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| SP5 Geology and Earth Resources of Delaware |
DGS Staff |
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| B7 Engineering Materials of Northern New Castle County |
Ward, R.F., 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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