@misc{indiciae556886244b7f,
  title = {Crystal Clear mica mine, Randolph County, Alabama},
  author = {Walter E. Heinrich},
  year = {1952},
  doi = {10.3133/ofr5272},
  url = {https://pubs.usgs.gov/publication/ofr5272},
  note = {Source identifier: ofr5272}
}