@misc{indiciae2a57a0c153cc, title = {Water resources data, Pennsylvania, water year 1991. Volume 2. Susquehanna and Potomac River Basins}, author = {R.R. Durlin and W.P. Schaffstall}, year = {1992}, doi = {10.3133/wdrpa912}, url = {https://pubs.usgs.gov/publication/wdrPA912}, note = {Source identifier: wdrPA912} }