@misc{indiciaebfb288c4400f,
  title = {Anomalous free-field recordings at certain seismograph locations},
  author = {G.N. Bycroft},
  year = {1981},
  doi = {10.3133/ofr82318},
  url = {https://pubs.usgs.gov/publication/ofr82318},
  note = {Source identifier: ofr82318}
}