@misc{indiciaeabf28d3c6c60,
  title = {Tectonic structure of the main part of the basalt of the Columbia River group, Washington, Oregon, and Idaho},
  author = {R. C. Newcomb},
  year = {1970},
  doi = {10.3133/i587},
  url = {https://pubs.usgs.gov/publication/i587},
  note = {Source identifier: i587}
}