@misc{indiciaefddc6eeb17f9,
  title = {Precise level lines at Crater Lake, Newberry Crater, and South Sister, Oregon},
  author = {K.M. Yamashita and M.P. Doukas},
  year = {1987},
  doi = {10.3133/ofr87293},
  url = {https://pubs.usgs.gov/publication/ofr87293},
  note = {Source identifier: ofr87293}
}