DGS Publications
| Title | Authors | Publication Date |
|---|---|---|
| OFR54 Bedrock Geologic Map of the Delaware Piedmont | Schenck, W.S. | |
| RI78 Subsurface Geology of the Area Between Wrangle Hill and Delaware City, Delaware | Jengo, J.W., McLaughlin, P.P., Ramsey, K.W. | |
| GM10 Bedrock Geologic Map of the Piedmont of Delaware and Adjacent Pennsylvania | Schenck, W.S., Plank, M.O., Srogi, L. |