@misc{indiciae5a6dee683adc,
  title = {A test of a mechanical multi-impact shear-wave seismic source},
  author = {David M. Worley and Jack K. Odum and Robert A. Williams and William J. Stephenson},
  year = {2001},
  doi = {10.3133/ofr01440},
  url = {https://pubs.usgs.gov/publication/ofr01440},
  note = {Source identifier: ofr01440}
}