@misc{indiciae067c4b603fc1,
  title = {Lithofacies of the Helena and Wallace formations (Belt Supergroup, middle Proterozoic), Montana and Idaho},
  author = {C. A. Wallace and J. E. Harrison and D. J. Lidke and J. W. Whipple},
  year = {1999},
  url = {https://pubs.usgs.gov/publication/70093959},
  note = {Source identifier: 70093959}
}