James I. Sams
Effects of coal-mine drainage on stream water quality in the Allegheny and Monongahela River basin -- sulfate transport and trends- Effects of coal-mine drainage on stream water quality in the Allegheny and Monongahela River basins
- Water-quality conditions during low flow in the lower Youghiogheny River basin, Pennsylvania, October 5-7, 1998
- Water-quality conditions during low flow in the lower Youghiogheny River basin, Pennsylvania, October 5-7, 1998