@misc{indiciae756da94a8e43,
  title = {Alabama mica mines},
  author = {J. C. Olson and E. W. Heinrich and R. W. Lemke},
  year = {1944},
  doi = {10.3133/ofr4463},
  url = {https://pubs.usgs.gov/publication/ofr4463},
  note = {Source identifier: ofr4463}
}