Title
Effects of low-level dams on the distribution of sediment, trace metals, and organic substances in the lower Schuylkill River Basin, Pennsylvania / by Thomas H. Yorke, John K. Stamer, and Gary L. Pederson.
Published
[Reston, Va.?] : Dept. of the Interior, U.S. Geological Survey ; Alexandria, Va. : For sale by Distribution Branch, Text Products Section, USGS, 1985.