@misc{indiciaed937e157a3a5,
  title = {Officer's cave, a pseudokarst feature in altered tuff and volcanic ash of the John Day formation in eastern Oregon},
  author = {Garald G. Parker and Lynn M. Shown and Karl W. Ratzlaff},
  year = {1964},
  doi = {10.1130/0016-7606(1964)75[393:ocapfi]2.0.co;2},
  url = {https://pubs.usgs.gov/publication/70221185},
  note = {Source identifier: 70221185}
}