@misc{indiciae77d73b85b0f6,
  title = {Mineralized and unmineralized calderas in Spain; Part I, evolution of the Los Frailes Caldera},
  author = {C. G. Cunningham and A. Arribas and J. J. Rytuba},
  year = {1990},
  doi = {10.1007/bf00205246},
  url = {https://pubs.usgs.gov/publication/70015818},
  note = {Source identifier: 70015818}
}