Sams, J. I., & Beer, K. M. (2000). Effects of coal-mine drainage on stream water quality in the Allegheny and Monongahela River basin --sulfate transport and trends. U.S. Dept. of the Interior, U.S. Geological Survey, National Water-Quality Assessment Program.
Chicago Style (17th ed.) CitationSams, James I., and Kevin M. Beer. Effects of Coal-mine Drainage on Stream Water Quality in the Allegheny and Monongahela River Basin --sulfate Transport and Trends. Lemoyne, Pa.: U.S. Dept. of the Interior, U.S. Geological Survey, National Water-Quality Assessment Program, 2000.
MLA (9th ed.) CitationSams, James I., and Kevin M. Beer. Effects of Coal-mine Drainage on Stream Water Quality in the Allegheny and Monongahela River Basin --sulfate Transport and Trends. U.S. Dept. of the Interior, U.S. Geological Survey, National Water-Quality Assessment Program, 2000.