1. “Annual Report of the Chief Inspector of Factories for the Year 1947” (1949) London, HM Stationery Ofc., pp. 79–81.
2. Asbestose*
3. Benzene Ceiling Level Lowered to 10 PPM (July 14, 1977). Dow Today No. 41 (Dow Chemical, Pub. Relations Dept.).
4. (June 5, 1980). Letter to Col. VL Carter (Chairman, TLV committee).