| SP16 Generalized Geologic Map of Delaware, Postcard |
DGS Staff |
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| SP19 Delaware: Its Rocks, Minerals, and Fossils |
DGS Staff |
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| OFR24 Saturated Thickness of the Water-Table Aquifer in Southern New Castle County, Delaware |
Demicco, P.M., Groot, J.J., Cherry, P.J. |
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| OFR25 Saturated Thickness of the Columbia Formation in Southern New Castle County, Delaware |
Groot, J.J., Demicco, P.M., Cherry, P.J. |
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| OFR23 Ground-Water Availability in Southern New Castle County, Delaware |
Groot, J.J., Demicco, P.M., Cherry, P.J. |
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| SP7 Selected Fossil Collecting Locations in Delaware and Minerals in Delaware |
DGS Staff |
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| SP5 Geology and Earth Resources of Delaware |
DGS Staff |
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| SP2 Long-Range Plan for Water Resources Investigations in Delaware |
DGS Staff |
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| SP1 The Story of Your State Geological Survey's Search for Water |
DGS Staff |
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