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• Decade: 1970s ×
• Person: Ralph D. Zumwalde ×
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1 result for “Union Carbide Corporation”

1. Company document · Union Carbide documents · July 1972 · page 4

   S. G. Bayer and R. D. Zumwalde, Evaluating Airborne Asbestos Dust: Membrane Filter Sampling and Phase-Contrast Fiber Counting Procedure (1972)

   In the document: …the best optical microscopes. However, since the U.S. asbestos dust standard is based on cumstance, one can select from a UCC 006968 Union Carbide trial exhibit UC-2174: S. G. Bayer and R. D. Zumwalde…