@misc{indiciae46c5b7e0ca0e,
  title = {Conodont color alteration; an index to organic metamorphism},
  author = {Anita G. Epstein and Jack Burton Epstein and Leonard D. Harris},
  year = {1975},
  doi = {10.3133/ofr75379},
  url = {https://pubs.usgs.gov/publication/ofr75379},
  note = {Source identifier: ofr75379}
}