1. ACGIH (1991–1993): “Documentation of the TLVs and BEIs (6th Ed.).” Cincinnati: American Conference of Governmental Industrial Hygienists.
2. , (March 31, 1993): OSHA exposure limits on 400 toxins are rolled back. Chem Week, p 14.
3. Corporate influence on threshold limit values
4. E.I. du Pont de Nemours & Company (1966): Standards Section—Safety and Fire Protection Subcommittee Minutes of the Meeting held Tuesday, August 30, 1966, at 9:00 A.M. in Room 13418, Nemours Building. Dated September 1, 1966.
5. Threshold limit values, permissible exposure limits, and feasibility: The bases for exposure limits in the United States