@misc{indiciaeec5d1c82cf5b,
  title = {Notes on the geology of Gravina Island, Alaska},
  author = {P. S. Smith},
  year = {1916},
  doi = {10.3133/pp95h},
  url = {https://pubs.usgs.gov/publication/pp95H},
  note = {Source identifier: pp95H}
}