SP16 Generalized Geologic Map of Delaware, Postcard |
DGS Staff |
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RI59 Bedrock Geology of the Piedmont of Delaware and Adjacent Pennsylvania |
Plank, M.O., Schenck, W.S., Srogi, L. |
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GM10 Bedrock Geologic Map of the Piedmont of Delaware and Adjacent Pennsylvania |
Schenck, W.S., Plank, M.O., Srogi, L. |
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SP19 Delaware: Its Rocks, Minerals, and Fossils |
DGS Staff |
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RI24 Relation of Ground Water to Surface Water in Four Small Basins of the Delaware Coastal Plain |
Johnston, R.H. |
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SP5 Geology and Earth Resources of Delaware |
DGS Staff |
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