@misc{indiciaeba87239ec8c0,
  title = {Petrology of the volcanic rocks of Guam, with a section on trace elements in the volcanic rocks of Guam},
  author = {J. T. Stark and J. I. Tracey},
  year = {1963},
  doi = {10.3133/pp403c},
  url = {https://pubs.usgs.gov/publication/pp403C},
  note = {Source identifier: pp403C}
}