COALVAL, a prefeasibility software package for evaluating coal properties using Lotus 1-2-3, release 2.2
Subtitle: documentation and user's guide
By: by Matthew N. Plis, Timothy J. Rohrbacher, and Dale D. Teeters.
Contributors: Rohrbacher, Timothy J.; Teeters, Dale D.
Series: Information circular ;; 9348; Information circular (United States. Bureau of Mines) ;; 9348.
Publisher: U.S. Dept. of the Interior, Bureau of Mines
Published: 1993
Place of publication: [Washington, D.C.]
Language: eng
Number of pages: 93
Subjects: COALVAL.; Coal mines and mining -- Valuation -- Data processing.