@article{216607,
      note = {Relief shown by contours and spot heights.},
      author = {Kellogg, Karl S.},
      url = {http://library.usi.edu/record/216607},
      title = {Geologic map of the Dillon quadrangle, Summit and Grand  Counties, Colorado /},
      publisher = {The Survey,},
      recid = {216607},
      pages = {1 map :},
      address = {[Reston, Va.?] :},
      year = {1997},
}