@misc{indiciaeeb8c7b1fb78f,
  title = {A geophysical and geological study of Laguna de Ayarza, a Guatemalan caldera lake},
  author = {L. J. Poppe and C. K. Paull and C. G. Newhall and J.P. Bradbury and J. Ziagos},
  year = {1985},
  url = {https://pubs.usgs.gov/publication/70012718},
  note = {Source identifier: 70012718}
}