@misc{indiciae8d5bff904c60,
  title = {User's manual for QWGRAF, computer programs for water-quality graphics},
  author = {J.C. Schornick and M.C. Place},
  year = {1998},
  doi = {10.3133/wri974226},
  url = {https://pubs.usgs.gov/publication/wri974226},
  note = {Source identifier: wri974226}
}