@misc{indiciae82056de4cbf3,
  title = {Range of earth structure nonuniqueness implied by body wave observations.},
  author = {Wiggins, R. A. and Mcmechan, G. A. and Toksoz, M. N.},
  year = {1973},
  url = {https://ntrs.nasa.gov/citations/19730039977},
  note = {Source identifier: 19730039977}
}