DGS Publications
| Title | Authors | Publication Date |
|---|---|---|
| RI27 Ground-Water Investigations in the Delaware Piedmont for the City of Newark, 1976 | Hahn, W.F. | |
| OFR9 Geologic Field Trips in Delaware | Benson, R.N., Hahn, W.F., Jordan, R.R., Pickett, T.E., Talley, J.H., Thompson, A.M., Woodruff, K.D. |