@misc{indiciaebc34e67e90bb,
  title = {The Soviet-American exchange in earthquake prediction},
  author = {Henry Spall and D.W. Simpson},
  year = {1981},
  doi = {10.3133/ofr811150},
  url = {https://pubs.usgs.gov/publication/ofr811150},
  note = {Source identifier: ofr811150}
}