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Water quality monitoring of drinking water supply sources in 1977 National Park Service Water Resources Division; National Park Service
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1977-12-01
Man bent over, drinking water from a stream in woods Mammoth Cave National Park; National Park Service
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Circa 1930
Surface Water Quality Monitoring Network (Bibliography) Includes bibliographical references.; (Statement of Responsibility) Guy J. Germain.; Cover title.; "DRE 317."; "June 1994."
1994-06
Potential potable-water supplies in Redwood National Park, California National Park Service Water Resources Division; National Park Service
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1978-11
Potential potable-water supplies in Redwood National Park, California National Park Service Water Resources Division; National Park Service
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1978-11-21
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