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Thomas Gwyn Newport has written:

'Summary ground-water resources of Washington County, Pennsylvania' -- subject(s): Groundwater

'Ground-water resources of the lower Niobrara River and Ponca Creek basins, Nebraska and South Dakota' -- subject(s): Groundwater

'Reconnaissance of the ground-water resources of the Elkhorn River basin above Pilger, Nebraska' -- subject(s): Groundwater

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10y ago

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