@misc{indiciaea2ecb29ebc8d,
  title = {Map of major lithologic units in the Pacific Northwest: A contribution to the Interior Columbia Basin Ecosystem Management Project},
  author = {B. R. Johnson and G. L. Raines},
  year = {2001},
  doi = {10.3133/i2674},
  url = {https://pubs.usgs.gov/publication/i2674},
  note = {Source identifier: i2674}
}