@misc{indiciae75286d33bd8b,
  title = {Preliminary analytical results for a new U.S. Geological Survey Devonian Ohio Shale Standard SDO-1},
  author = {Joel S. Leventhal and J.G. Crock and W. Mountjoy and J.A. Thomas and V.E. Shale and Paul H. Briggs and J.S. Wahlberg and M.J. Malcolm},
  year = {1978},
  doi = {10.3133/ofr78447},
  url = {https://pubs.usgs.gov/publication/ofr78447},
  note = {Source identifier: ofr78447}
}