Effects of coal-mine discharges on the quality of the Stonycreek River and its tributaries, Somerset and Cambria counties, Pennsylvania
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- Open Author
Williams, Donald R.
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- EOEffects of coal-mine discharges...Williams, Donald R.
Effects of coal-mine discharges on the quality of the Stonycreek River and its tributaries, Somerset and Cambria counties, Pennsylvania
- EOEffects of coal-mine discharges...Williams, Donald R.
Effects of coal-mine discharges on the quality of the Stonycreek River and its tributaries, Somerset and Cambria counties, Pennsylvania
- EOEffects of coal-mine discharges...Williams, Donald R.
Effects of coal-mine discharges on the quality of the Stonycreek River and its tributaries, Somerset and Cambria counties, Pennsylvania
- EOEffects of coal-mine discharges...Williams, Donald R.
Effects of coal-mine discharges on the quality of the Stonycreek River and its tributaries, Somerset and Cambria counties, Pennsylvania
- EOEffects of coal-mine discharges...Williams, Donald R.
Effects of coal-mine discharges on the quality of the Stonycreek River and its tributaries, Somerset and Cambria counties, Pennsylvania
- EOEffects of coal-mine discharges...Williams, Donald R.
Effects of coal-mine discharges on the quality of the Stonycreek River and its tributaries, Somerset and Cambria counties, Pennsylvania
