@misc{indiciae9a8fe0f0e9fd,
  title = {Use of ground-penetrating radar to investigate refilled scour holes at bridge foundations},
  author = {F.P. Haeni and Gary Placzek and R.E. Trent},
  year = {1992},
  url = {https://pubs.usgs.gov/publication/70206250},
  note = {Source identifier: 70206250}
}