Pikes Peak

  • Phenacite from Colorado
    Samuel L. Penfield
    American Journal of Science February 1887, s3-33 (194) 130-135; DOI: https://doi.org/10.2475/ajs.s3-33.194.130
  • Mineralogical notes
    William Earl Hidden
    American Journal of Science March 1885, s3-29 (171) 249-251; DOI: https://doi.org/10.2475/ajs.s3-29.171.249
  • Notes on some interesting minerals occurring near Pikes Peak, Colorado
    Charles Whitman Cross and W. F. Hillebrand
    American Journal of Science October 1882, s3-24 (142) 281-286; DOI: https://doi.org/10.2475/ajs.s3-24.142.281
  • Bastnaesite and tysonite from Colorado
    Oscar D. Allen and W. J. Comstock
    American Journal of Science May 1880, s3-19 (113) 390-393; DOI: https://doi.org/10.2475/ajs.s3-19.113.390