DGS Publications
| Title | Authors | Publication Date |
|---|---|---|
| RI50 Plant Microfossils of the Calvert Formation of Delaware | Groot, J.J. | |
| RI47 Ages of the Bethany, Beaverdam, and Omar Formations of Southern Delaware | Groot, J.J., Ramsey, K.W., Wehmiller, J.F. | |
| HM3 Geohydrology of the Wilmington Area, Delaware | Woodruff, K.D. | |
| HM2 Geohydrology of the Newark Area, Delaware | Woodruff, K.D. |