@misc{indiciae5015f71aae0e,
  title = {Reconnaissance geologic map of the Morococala volcanic field, Bolivia},
  author = {R. G. Luedke and R. P. Koeppen and Mario A. Flores and Alfredo O. Espinosa},
  year = {1990},
  doi = {10.3133/i2014},
  url = {https://pubs.usgs.gov/publication/i2014},
  note = {Source identifier: i2014}
}