DGS Publications
| Title | Authors | Publication Date |
|---|---|---|
| RI58 The Pliocene and Quaternary Deposits of Delaware: Palynology, Ages, and Paleoenvironments | Groot, J.J., Jordan, R.R. | |
| RI55 Geology of the Milford and Mispillion River Quadrangles | 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. |