@misc{indiciae7bbdc2474149,
  title = {Discharge ratings for control gates at Mississippi River Lock and Dam 18, Gladstone, Illinois},
  author = {A.J. Heinitz},
  year = {1987},
  doi = {10.3133/wri874110},
  url = {https://pubs.usgs.gov/publication/wri874110},
  note = {Source identifier: wri874110}
}