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. | |
| RI3 Wells for the Observation of Chloride and Water Levels in Aquifers that Cross the Chesapeake and Delaware Canal | Rasmussen, W.C., Groot, J.J., Beamer, N.H. | |
| B7 Engineering Materials of Northern New Castle County | Ward, R.F., Groot, J.J. |