@misc{indiciae69c5c3a2c64e,
  title = {Metamorphism and the origin of granitic rocks, Northgate district, Colorado},
  author = {T. A. Steven},
  year = {1957},
  doi = {10.3133/pp274m},
  url = {https://pubs.usgs.gov/publication/pp274M},
  note = {Source identifier: pp274M}
}