@misc{indiciaec45948fdb3d0,
  title = {Water quality in the Potomac River basin, Maryland, Pennsylvania, Virginia, West Virginia, and the District of Columbia, 1992-96},
  author = {Scott W. Ator and Joel D. Blomquist and John W. Brakebill and Janet M. Denis and Matthew J. Ferrari and Cherie V. Miller and Humbert Zappia},
  year = {1998},
  doi = {10.3133/cir1166},
  url = {https://pubs.usgs.gov/publication/cir1166},
  note = {Source identifier: cir1166}
}