DGS Publications
| Title | Authors | Publication Date |
|---|---|---|
| GM22 Geologic Map of the Sharptown, Laurel, Hebron, and Delmar Quadrangles, Delaware | Ramsey, K.W., Tomlinson, J.L. | |
| GM21 Geologic Map of the Trap Pond and Pittsville Quadrangles, Delaware | Tomlinson, J.L., Ramsey, K.W. |