@misc{indiciae9bde5ab740ac,
  title = {Acoustic systems for the measurement of streamflow},
  author = {Antonius Laenen and Winchell Smith},
  year = {1983},
  doi = {10.3133/wsp2213},
  url = {https://pubs.usgs.gov/publication/wsp2213},
  note = {Source identifier: wsp2213}
}