@article{227204,
      author = {Trimble, Donald E.},
      url = {http://library.usi.edu/record/227204},
      title = {Unstable ground in western North Dakota /},
      publisher = {Branch of Distribution, U.S. Geological Survey,},
      recid = {227204},
      pages = {iii, 19 p. :},
      address = {Arlington, Va. :},
      year = {1979},
}