1. Union Carbide Corporation www.bhopal.com/irs.htm 2009
2. Occupational Safety and Health Administration
3. Occupational Safety and Health Administration http://www.osha.gov/pls/oshaweb/owadisp.show_document?p_table=PREAMBLES&p_id=1038 2009
4. Occupational Safety and Health Administration http://www.osha.gov/pls/oshaweb/owadisp.show_document?p_table=DIRECTIVES&p_id=3589 2009