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. | |
| OFR24 Saturated Thickness of the Water-Table Aquifer in Southern New Castle County, Delaware | Demicco, P.M., Groot, J.J., Cherry, P.J. |