@misc{indiciae78fc8b87383f,
  title = {A geochemical study of oil in metalliferous veins, Idarado Mine, San Juan Mountains, Colorado},
  author = {Peter M. Gerrild},
  year = {1976},
  url = {https://pubs.usgs.gov/publication/70042949},
  note = {Source identifier: 70042949}
}