@misc{indiciae940046769806,
  title = {Inverse problems for torsional modes.},
  author = {C. Willis},
  year = {1984},
  doi = {10.1111/j.1365-246x.1984.tb05074.x},
  url = {https://pubs.usgs.gov/publication/70013387},
  note = {Source identifier: 70013387}
}