@misc{indiciaeb8640ea673cf,
  title = {Relation between specific gravity and iron content of rocks from the Red Mountain Formation, Alabama},
  author = {R.P. Sheldon},
  year = {1964},
  doi = {10.3133/b1182d},
  url = {https://pubs.usgs.gov/publication/b1182D},
  note = {Source identifier: b1182D}
}