@article{195520,
      note = {Distributed to depository libraries in microfiche.},
      author = {Magers, Jeff A.},
      url = {http://library.usi.edu/record/195520},
      title = {Surface subsidence over a room-and-pillar mine in the  western United States /},
      publisher = {U.S. Dept. of the Interior, Bureau of Mines,},
      recid = {195520},
      pages = {15 p. :},
      address = {[Washington, D.C.?] :},
      year = {1993},
}