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- [21] PERFORMANCE OF RESPIRABLE DUST SAMPLERS WITH FIBROUS DUST AMERICAN INDUSTRIAL HYGIENE ASSOCIATION JOURNAL, 1971, 32 (08): : 499 - &
- [23] EFFECT OF COAL MINE HEALTH AND SAFETY ACT ON RESPIRABLE DUST CONCENTRATIONS IN COAL MINES AMERICAN INDUSTRIAL HYGIENE ASSOCIATION JOURNAL, 1972, 33 (12): : 806 - 810