@misc{indiciaec6feab061216,
  title = {Structure and mineralization of Precambrian rocks in the Galena-Roubaix district, Black Hills, South Dakota},
  author = {Richard W. Bayley},
  year = {1970},
  doi = {10.3133/b1312e},
  url = {https://pubs.usgs.gov/publication/b1312E},
  note = {Source identifier: b1312E}
}