Logistics of underground coal mining/

Eitemau Tebyg

• Underground loudspeaker communication systems in coal mines
  gan: 8096 British Standards Institution
  Cyhoeddwyd: (1983)
• Coal-age operating handbook of underground mining /
  gan: Chironis, Nicholas P.
  Cyhoeddwyd: (1977)
• Underground coal mining : production and cost functions /
  gan: 431980 Halvorson, Alan Lyle
• Underground disposal of coal mine wastes : a report to the National Science Foundation/
  gan: United States. National Academy of Sciences, et al.
  Cyhoeddwyd: (1975)
• Cost-effective drilling and blasting in surface coal mines/
  gan: Australian Mineral Foundation
  Cyhoeddwyd: (1985)