Contributions

  • Kravits, S. J. - Contributor

Publication

1987 - U.S. Dept. of the Interior, Bureau of Mines, Pittsburgh, Pa, Pennsylvania

Language

English

Word Count

20,250 words, Guess

Page Count

81 pages

Identifiers

Classifications

  • DDC622 s
  • DDC622/.26
  • LCCTN23 .U43 no. 9098
and 1 more
  • LCCTN288 .U43 no. 9098

Subjects

Topics

Longwall miningMine roof controlLongwall mining -- Appalachian Region

Series Statement

  • Report of investigations ;
  • 9098
  • Report of investigations (United States. Bureau of Mines) ;

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