@misc{indiciae38c17244bff0, title = {Evaluation of agricultural best-management practices in the Conestoga River headwaters, Pennsylvania: A summary report, 1982-90}, author = {Patricia L. Lietman}, year = {1997}, doi = {10.3133/wsp2493}, url = {https://pubs.usgs.gov/publication/wsp2493}, note = {Source identifier: wsp2493} }