www.stps.gob.mx
Asociacion de Ingenieros de Minas, Metalurgistas y Geologos de Mexico A.C.
Internacional
OSHA
Occupational Safety and Health Administration
www.osha.gov
National Fire Protection Association
www.nfpa.org
NATIONAL SAFETY COUNCIL
www.nsc.org
www.ansi.org
![[logo] US EPA](http://www.epa.gov/epafiles/images/logo_epaseal.gif){kind=logo}
www.epa.gov
www.ul.com
NIOSH National Institute for Occupational Safety and
Health
www.cdc.gov/niosh
ASTM
American Society for Testing and Materials
www.astm.org