@misc{indiciae9db8efc42de8,
  title = {The relationship between the Porco, Bolivia, Ag-Zn-Pb-Sn deposit and the Porco caldera},
  author = {C. G. Cunningham and Hugo Aparicio N. and Fernando Murillo S. and Nestor C. Jimenez and J. L. Lizeca B. and E.H. McKee and G. E. Ericksen and Franz Tavera V.},
  year = {1994},
  doi = {10.3133/ofr94238},
  url = {https://pubs.usgs.gov/publication/ofr94238},
  note = {Source identifier: ofr94238}
}