@misc{indiciae70e22a12f65b,
  title = {Discharge ratings for control gates at Mississippi River lock and dam 21, Quincy, Illinois},
  author = {A.J. Heinitz},
  year = {1987},
  doi = {10.3133/wri874155},
  url = {https://pubs.usgs.gov/publication/wri874155},
  note = {Source identifier: wri874155}
}