Contributions

  • Johnson, Bradley V. - Contributor
  • Thimons, Edward D. - Contributor

Publication

1986 - U.S. Dept. of the Interior, Bureau of Mines, Pittsburgh, Pa, Pennsylvania

Language

English

Word Count

2,750 words, Guess

Page Count

11 pages

Identifiers

Classifications

  • DDC622 s
  • DDC622/.24
  • LCCTN295 .U4 no. 9108
and 1 more
  • LCCTN345 .U4 no. 9108

Alternate Titles

  • Roadheaders.

Subjects

Series Statement

  • Information circular ;
  • 9108
  • Information circular (United States. Bureau of Mines ;

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