@misc{indiciaecb618c0c18b5,
  title = {Water quality of selected streams in the coal area of southeastern Montana},
  author = {J. R. Knapton and P. W. McKinley},
  year = {1977},
  doi = {10.3133/wri7780},
  url = {https://pubs.usgs.gov/publication/wri7780},
  note = {Source identifier: wri7780}
}