@misc{indiciaed2dc800138fc,
  title = {Rutile and topaz in Precambrian gneiss, Jefferson and Clear Creek Counties, Colorado},
  author = {Douglas M. Sheridan and Richard B. Taylor and Sherman P. Marsh},
  year = {1968},
  doi = {10.3133/cir567},
  url = {https://pubs.usgs.gov/publication/cir567},
  note = {Source identifier: cir567}
}