@article{68156,
      recid = {68156},
      author = {Chao, E. C. T.},
      title = {Recommended procedures and methodology of coal description  /},
      publisher = {U.S. Dept. of the Interior, Geological Survey,},
      address = {[Washington] :},
      pages = {iv, 31 p. :},
      year = {1983},
      note = {"This document is the result of a workshop on coal  description held for the Branch of Coal Resources of the  U.S. Geological Survey in March 1982"--Abstract.},
      url = {http://library.usi.edu/record/68156},
}