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Efficient permanent closure of abandoned mine safety hazards on BLM-managed lands

Ross, Christopher, author.
[Denver, Colorado] : [U.S. Department of the Interior], Bureau of Land Management, National Science & Technology Center, 2004. 2004

Performance of a polyurethane core seal tested in a hydrostatic chamber

Dolinar, Dennis R.
Pittsburgh, PA : Dept. of of Health and Human Services, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, Pittsburgh Research Laboratory, [2008] 2008