U.S. Department of Labor, OSHA
State of Hawaii Occupational Safety and Health
Agency for Toxic Substances and Disease Registry
American Conference of Governmental Industrial Hygienists (ACGIH)
American Society of Heating, Refigeration, and Air-Conditioning Engineers, Inc.
U.S. Department of Labor, Mine Safety and Health Administration
Vermont Safety Information Resources on the InterNet
Northwest Fisheries Science Center