@misc{indiciaec37ec1a55908,
  title = {Scheelite in the precambrian gneisses of Colorado},
  author = {O.L. Tweto},
  year = {1960},
  doi = {10.2113/gsecongeo.55.7.1406},
  url = {https://pubs.usgs.gov/publication/70220488},
  note = {Source identifier: 70220488}
}