@misc{indiciae1d4d3a43040d,
  title = {Geologic aspects of tunneling in the Los Angeles area, California},
  author = {R. F. Yerkes and J. C. Tinsley and Kathleen M. Williams},
  year = {1977},
  doi = {10.3133/mf866},
  url = {https://pubs.usgs.gov/publication/mf866},
  note = {Source identifier: mf866}
}