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eTools Home : Silica  Site Map | SEP | FAQ | Bibliography | Glossary | Viewing / Printing Instructions | Credits Exposure Measure Amount Compare to Limit Protection      Print this page to obtain a clearer image From American Conference of Governmental Industrial Hygienists (ACGIH): Industrial Ventilation: A Manual of Recommended Practice, 21st Ed. Copyright 1992, Cincinnati, OH. Reprinted with permission. Return to Previous Page   eTools Home : Silica  Site Map | SEP | FAQ | Bibliography | Glossary | Viewing / Printing Instructions | Credits

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