DGS Publications
| Title | Authors | Publication Date |
|---|---|---|
| RI55 Geology of the Milford and Mispillion River Quadrangles | Ramsey, K.W., Groot, J.J. | |
| RI53 Geology of the Seaford Area, Delaware | Andres, A.S., Ramsey, K.W., Groot, J.J. | |
| RI8 Evaluation of the Water Resources of Delaware | Baker, W.W., Varrin, R.D., Groot, J.J., Jordan, R.R. |