@misc{indiciae7b27bd4ff75d,
  title = {Quality of surface waters of the United States, 1967, Parts 3 and 4, Ohio River basin and St. Lawrence River basin},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1971},
  doi = {10.3133/wsp2012},
  url = {https://pubs.usgs.gov/publication/wsp2012},
  note = {Source identifier: wsp2012}
}