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. | |
| SP17 The Delaware Geological Survey: The Formative Years, 1951-1969 | Groot, J.J. | |
| RI2 High-Capacity Test Well Developed at the Air Force Base, Dover, Delaware | Rasmussen, W.C., Groot, J.J., Depman, A.J. |