@misc{indiciaebe9c816f8dc7,
  title = {Geotechnical investigations at strong-motion stations in the Imperial Valley, California},
  author = {R. L. Porcella},
  year = {1984},
  doi = {10.3133/ofr84562},
  url = {https://pubs.usgs.gov/publication/ofr84562},
  note = {Source identifier: ofr84562}
}