@article{232229,
      author = {Christiansen, Robert L. and Blank, H. Richard},
      url = {http://library.usi.edu/record/232229},
      title = {Volcanic stratigraphy of the Quaternary rhyolite plateau  in Yellowstone National Park,},
      publisher = {U.S. Govt. Print. Off.,},
      recid = {232229},
      pages = {v, 18 p. :},
      address = {Washington,},
      year = {1972},
}