@misc{indiciaebf55659aef9d,
  title = {Spectrographic analyses of Paleozoic black shale samples},
  author = {James David Vine},
  year = {1965},
  doi = {10.3133/ofr65166},
  url = {https://pubs.usgs.gov/publication/ofr65166},
  note = {Source identifier: ofr65166}
}