@misc{indiciaebe9ebbe63047,
  title = {Pegmatite investigations 1942-1945, Black Hills, South Dakota},
  author = {L. R. Page},
  year = {1953},
  doi = {10.3133/pp247},
  url = {https://pubs.usgs.gov/publication/pp247},
  note = {Source identifier: pp247}
}