• EPA Air Toxics: www.epa.gov/ttn/amtic/airtox.html
• Mine Safety and Health Administration (MSHA): www.mhsa.gov
• NIOSH-National Institute of Occupational Safety & Health: www.cdc.gov/niosh
• NIOSH- Manuale e Metodi: www.cdc.gov/niosh/nmam
• OSHA-Occupational Safety & Health Administration: www.osha.gov
• OSHA-Manuale dei Metodi: www.osha.gov/dts/sltc/methods/index.html
• ASTM: International Standards: www.astm.org/index.shtml
• Istituto Superiore per la Sanità: www.iss.it
• UNI–Ente Nazionale Italiano di Unificazione: www.uni.com/it/
• UNICHIM: www.unichim.it/
• VDI: www.vdi.de