@misc{indiciaed3726e71b4b7,
  title = {Chemical analyses of surface water in Illinois, 1958–74—Volume II, Illinois River basin and Mississippi River tributaries north of Illinois River basin},
  author = {R. W. Healy and L.G. Toler},
  year = {1978},
  doi = {10.3133/wri7823},
  url = {https://pubs.usgs.gov/publication/wri7823},
  note = {Source identifier: wri7823}
}