@article{184679,
      note = {Distributed to depository libraries in microfiche.},
      author = {McWilliams, P. C. and Kekering, J. C. and Miller, S. M.},
      url = {http://library.usi.edu/record/184679},
      title = {Estimation  of shear strength using fractals as a measure  of rock fracture roughness [microform] /},
      publisher = {U.S. Dept. of the Interior, Bureau of Mines,},
      recid = {184679},
      pages = {ii, 36 p. :},
      address = {Washington, D.C. :},
      year = {1993},
}