@misc{indiciae0bd99072f3f1,
  title = {The structure and stratigraphy of Gravina and Revillagigedo Islands, Alaska},
  author = {Theodore Chaplin},
  year = {1919},
  doi = {10.3133/pp120d},
  url = {https://pubs.usgs.gov/publication/pp120D},
  note = {Source identifier: pp120D}
}