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Preventing Massive Pillar Collapses in Coal Mines

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Withdrawn Jun 2025
1997
DHHS (NIOSH) Publication Number 97-122

 

List of Revisions

Revision Date Revisions Citation of Revision
1997 (Original)
June, 2025 Withdrawn – content part of proceedings https://www.cdc.gov/niosh/docs/mining/works/coversheet680.html

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