@article{184536,
      note = {"Contour interval 1 meter."},
      author = {Hereford, Richard. and Thompson, Kathryn S.},
      url = {http://library.usi.edu/record/184536},
      title = {Topographic map of the Granite Park area, Grand Canyon,  Arizona [microform] /},
      publisher = {The Survey ;},
      recid = {184536},
      pages = {1 map ;},
      address = {[Reston, Va.?] :},
      year = {1994},
}