APA (7th ed.) Citation

Barker, J. L., & Witt, E. C. (1990). Effects of acidic precipitation on the water quality of streams in the Laurel Hill area, Somerset County, Pennsylvania, 1983-86. U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Barker, James L., and Emitt C. Witt. Effects of Acidic Precipitation on the Water Quality of Streams in the Laurel Hill Area, Somerset County, Pennsylvania, 1983-86. Harrisburg, Pennsylvania: U.S. Geological Survey, 1990.

MLA (9th ed.) Citation

Barker, James L., and Emitt C. Witt. Effects of Acidic Precipitation on the Water Quality of Streams in the Laurel Hill Area, Somerset County, Pennsylvania, 1983-86. U.S. Geological Survey, 1990.