@misc{indiciaec9934e602c19,
  title = {World map of volcanoes and principal aeronautical features},
  author = {T. J. Casadevall and T.B. Thompson and Tom Fox},
  year = {1999},
  doi = {10.3133/i2700},
  url = {https://pubs.usgs.gov/publication/i2700},
  note = {Source identifier: i2700}
}