О средствах индивидуальной защиты от пыли

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20. Zhuang Ziqing; Christopher C. Coffey; Paul A. Jensen; Donald L. Campbell; Robert B. Lawrence; Warren R. Myers Correlation Between Quantitative Fit Factors and Workplace Protection Factors Measured in Actual Workplace Environments at a Steel Foundry American Industrial Hygiene Association Journal, 2004г. Vol.64 №6 p.730.

21. 29 CFR 1910.134 Appendix A – Fit Testing Procedures (США, 1999, 2003г., www.osha.gov).