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2. ACGIH: TLVs Threshold Limit Values for Chemical Substances and Physical Agents in the Workroom Environment with Intended Changes for 1980. Cincinnati: American Conference of Governmental Industrial Hygienists 1980.
3. BRUGNONE, F., L. PERBELLINI, L. GRIGOLINI, and P. APOSTOLI: Int. Arch. Occup. Environ. Health42, 51 (1978).
4. DOMMER, R.A., and R.G. MELCHER: Amer. Ind. Hyg. Assoc. J.39, 240 (1978).
5. DUPONT: Pro-TekTM Organic Vapor Air Monitoring Badge Instruction Manual G-AA/G-BB. Wilmington, Delaware. E.I. du Pont de Nemours & Co. 1980.