@misc{indiciae2c73e4742378,
  title = {South Dakota mica deposits},
  author = {T. A. Steven and L. R. Page and J.R. Adams and J.J. Norton and H.B. Hanley and M.P. Erickson and W.C. Stoll and A.F. Frites},
  year = {1948},
  doi = {10.3133/ofr4830},
  url = {https://pubs.usgs.gov/publication/ofr4830},
  note = {Source identifier: ofr4830}
}