DGS Publications
| Title | Authors | Publication Date |
|---|---|---|
| OFR54 Bedrock Geologic Map of the Delaware Piedmont | Schenck, W.S. | |
| GM17 Geologic Map of the Harbeson Quadrangle, Delaware | Ramsey, K.W., Tomlinson, J.L. | |
| GM10 Bedrock Geologic Map of the Piedmont of Delaware and Adjacent Pennsylvania | Schenck, W.S., Plank, M.O., Srogi, L. | |
| OFR13 Delaware's Extractive Mineral Industry | Doyle, R.G., Pickett, T.E. | |
| B7 Engineering Materials of Northern New Castle County | Ward, R.F., Groot, J.J. |