OFR21 A Guide to Fossil Sharks, Skates, and Rays from the Chesapeake and Delaware Canal Area, Delaware |
Lauginiger, E.M., Hartstein, E.F. |
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OFR18 A Numerical Indicator of Water Conditions for Northern Delaware |
Jordan, R.R., Woodruff, K.D. |
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OFR13 Delaware's Extractive Mineral Industry |
Doyle, R.G., Pickett, T.E. |
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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. |
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OFR8 Guidebook: Columbia Deposits of Delaware |
Jordan, R.R., Talley, J.H. |
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OFR4 Papers Presented by Staff Members of the Delaware Geological Survey at the Baltimore Meeting of the Northeastern Section of the Geological Society of America, March, 1974 |
Pickett, T.E. |
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OFR3 Preliminary Report on the Earthquake of February 28, 1973 |
Woodruff, K.D., Jordan, R.R., Pickett, T.E. |
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OFR2 Preliminary Report on Seismic Events in Northern Delaware |
Jordan, R.R., Pickett, T.E., Woodruff, K.D. |
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