@misc{indiciae194278be5631,
  title = {An updated rate-of-spread clock},
  author = {Jeremy Kolaks and Keith W. Grabner and George Hartman and Bruce E. Cutter and Edward F. Loewenstein},
  year = {2005},
  url = {https://pubs.usgs.gov/publication/70177757},
  note = {Source identifier: 70177757}
}