@article{226828,
      author = {Foley, N. K.},
      url = {http://library.usi.edu/record/226828},
      title = {Mineralogy, mineral chemistry, and paragenesis of gold,  silver, and base-metal ores of the North Amethyst vein  system, San Juan Mountains, Mineral County, Colorado /},
      publisher = {U.S. G.P.O.,},
      recid = {226828},
      pages = {iv, 39 p. :},
      address = {Washington :},
      year = {1993},
}