DGS Publications
| Title | Authors | Publication Date |
|---|---|---|
| RI59 Bedrock Geology of the Piedmont of Delaware and Adjacent Pennsylvania | Plank, M.O., Schenck, W.S., Srogi, L. | |
| GM10 Bedrock Geologic Map of the Piedmont of Delaware and Adjacent Pennsylvania | Schenck, W.S., Plank, M.O., Srogi, L. | |
| GM 4 Geology of the Wilmington Area, Delaware | Woodruff, K.D., Thompson, A.M. |