@misc{indiciae872e03d52338,
  title = {Processing of seismic tomography data collected at Tunnel 160, Deglen Mountain, Kazakhstan},
  author = {Karl Ellefsen and William Leith},
  year = {1999},
  doi = {10.3133/ofr99532},
  url = {https://pubs.usgs.gov/publication/ofr99532},
  note = {Source identifier: ofr99532}
}