1. AIHA Engineering Field Reference Manual,1982
2. AIHA Manual of Recommended Practice for Combustible Gas indicators and Portable, Direct-reading Hydrocarbon Detectors,1993
3. 1997–1998, Threshold Limit Values for Chemical Substances and Physical Agents and Biological Exposure Indices;American Conference of Governmental Industrial Hygienists (ACGIH),1998
4. Air Monitoring at Hazardous Waste Sites;Bishop,2000
5. Inhalation Exposures at Hazardous Waste Sites;Costello,1985