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. | |
| RI56 The Setters Formation in the Pleasant Hill Valley, Delaware: Metamorphism and Structure | Plank, M.O., Schenck, W.S. |