Use of computers in the coal industry 1990 : proceedings of the fourth conference on the use of computers in the coal industry, Morgantown, West. Virginia, 20 -22 June 1990 - Conference on the Use of Computers in the Coal Industry (4th : 1990 : West Virginia University, Morgan Town); Grayson, R. Larry; Wang, Y. J.; Sanford, Richard L. (1990)
Keywords: Coal trade -- Congresses; Computer service industry -- Congresses