DGS Publications
| Title | Authors | Publication Date |
|---|---|---|
| RI58 The Pliocene and Quaternary Deposits of Delaware: Palynology, Ages, and Paleoenvironments | Groot, J.J., Jordan, R.R. | |
| SP17 The Delaware Geological Survey: The Formative Years, 1951-1969 | Groot, J.J. | |
| B6 The Water Resources of Northern Delaware | Rasmussen, W.C., Groot, J.J., Martin, R.O.R., McCarren, E.F., Behn, V.C. | |
| B3 Marine Upper Cretaceous Formations of the Chesapeake and Delaware Canal | Organist, D.M., Richards, H.G., Groot, J.J. |