@misc{indiciaecb57f6e096e6,
  title = {Special problem caused by the epigenetic alterations of Liassic rocks},
  author = {Henry Joly and Ninck Joly},
  year = {1948},
  doi = {10.3133/ofr4817b},
  url = {https://pubs.usgs.gov/publication/ofr4817B},
  note = {Source identifier: ofr4817B}
}