@misc{indiciae5ddfa4e70a1d,
  title = {Geologic map of the Wolf Creek quadrangle, Lewis and Clark County, Montana},
  author = {Robert George Schmidt},
  year = {1972},
  doi = {10.3133/gq974},
  url = {https://pubs.usgs.gov/publication/gq974},
  note = {Source identifier: gq974}
}