@article{121617,
      note = {Part of illustrative matter in pocket.},
      author = {Mudge, Melville R.,},
      url = {http://library.usi.edu/record/121617},
      title = {Pre-Quaternary rocks in the Sun River Canyon area,  Northwestern Montana,},
      publisher = {U.S. Govt. Print. Off.,},
      recid = {121617},
      pages = {vi, 142 p. :},
      address = {Washington,},
      year = {1972},
}