@misc{indiciae369f30da6091,
  title = {Two-dimensional numerical simulation of elastic wave propagation for environmental and geotechnical studies},
  author = {K.J. Ellefsen},
  year = {1993},
  doi = {10.3133/ofr93714},
  url = {https://pubs.usgs.gov/publication/ofr93714},
  note = {Source identifier: ofr93714}
}