@misc{indiciae722a515a017b,
  title = {Oxidation potential and state of some vanadium ores and the relation of woody material to their deposition},
  author = {Alfred Michael Pommer},
  year = {1956},
  doi = {10.3133/ofr5698},
  url = {https://pubs.usgs.gov/publication/ofr5698},
  note = {Source identifier: ofr5698}
}