@misc{indiciae99387baf39de,
  title = {Quantitative analysis versus semiquantitative optical emission spectrographic analysis of chromium, nickel, zinc, vanadium, and molybdenum in organic-rich Paleozoic marine strata, Western United States},
  author = {George A. Desborough and F. G. Poole and Edwin K. Maughan and H.L. Groves and Gregory N. Green},
  year = {1980},
  doi = {10.3133/ofr801271},
  url = {https://pubs.usgs.gov/publication/ofr801271},
  note = {Source identifier: ofr801271}
}