TY - RPRT TI - Effects of low-level dams on the distribution of sediment, trace metals, and organic substances in the lower Schuylkill River basin, Pennsylvania AU - Thomas H. Yorke AU - John K. Stamer AU - Gary L. Pederson PY - 1985 DO - 10.3133/wsp2256b UR - https://pubs.usgs.gov/publication/wsp2256B ID - wsp2256B ER -