@misc{indiciae5be5fb7a07ab,
  title = {Hornblendes from a region of high-grade metamorphism, Front Range, Colorado},
  author = {Dolores J. Gable and Vertie C. Smith},
  year = {1975},
  doi = {10.3133/b1392},
  url = {https://pubs.usgs.gov/publication/b1392},
  note = {Source identifier: b1392}
}