@misc{indiciaee8e10fe77fa5,
  title = {PETAL2, PEnetration Testing and Liquefaction, an interactive computer program},
  author = {A.T. Chen},
  year = {1986},
  doi = {10.3133/ofr86178},
  url = {https://pubs.usgs.gov/publication/ofr86178},
  note = {Source identifier: ofr86178}
}