@misc{indiciae6d15caffcfbd,
  title = {Description of selected drill cores from the Precambrian Spokane Formation, Blacktail Mountain drilling site, Flathead County, Montana},
  author = {Mitchell W. Reynolds},
  year = {1979},
  doi = {10.3133/ofr79941},
  url = {https://pubs.usgs.gov/publication/ofr79941},
  note = {Source identifier: ofr79941}
}