@misc{indiciae3952fcab5fd0,
  title = {General geology of Guam},
  author = {J. I. Tracey and S.O. Schlanger and J. T. Stark and D. B. Doan and H. G. May},
  year = {1964},
  doi = {10.3133/pp403a},
  url = {https://pubs.usgs.gov/publication/pp403A},
  note = {Source identifier: pp403A}
}