@misc{indiciaeac48562993c0,
  title = {Friendship No. 1 mica mine, Randolph County, Alabama},
  author = {E. W. Heinrich and R. W. Lemke},
  year = {1945},
  doi = {10.3133/ofr4583},
  url = {https://pubs.usgs.gov/publication/ofr4583},
  note = {Source identifier: ofr4583}
}