@misc{indiciaeeff4ae7d8357,
  title = {Establishment of a Southern California geophysical data and analysis center},
  author = {David G. Harkrider and Robert F. Nickerson},
  year = {1981},
  doi = {10.3133/ofr81395},
  url = {https://pubs.usgs.gov/publication/ofr81395},
  note = {Source identifier: ofr81395}
}