@misc{indiciae2e47ac53f35e,
  title = {Geology and mineral resource appraisal of the Square Butte area, Chouteau County, Montana},
  author = {M.E. MacLachlan and W. L. Campbell and M. D. Kleinkopf and C.E. Larson},
  year = {1981},
  doi = {10.3133/mf1370},
  url = {https://pubs.usgs.gov/publication/mf1370},
  note = {Source identifier: mf1370}
}