@misc{indiciaec09a5f9ad062,
  title = {Near-surface P- and S-wave velocities from borehole measurements near Lake Hemet, California},
  author = {J. F. Gibbs},
  year = {1989},
  doi = {10.3133/ofr89630},
  url = {https://pubs.usgs.gov/publication/ofr89630},
  note = {Source identifier: ofr89630}
}