29CFR1910.1051 http://www.osha.gov/pls/oshaweb/owadisp.show_document?p_table=STANDARDS&p_id=10087
29CFR1910.1028 http://www.osha.gov/pls/oshaweb/owadisp.show_document?p_table=STANDARDS&p_id=10042
29CFR1910.1047 http://www.osha.gov/pls/oshaweb/owadisp.show_document?p_table=STANDARDS&p_id=10070
"Coshh Assessment Guide". Sunday, March 15, 2020 https://www.seton.co.uk/coshh-assessment
American Conference of Governmental Industrial Hygienists http://www.acgih.org/home.htm
"Workplace exposure limits". http://www.hse.gov.uk/toolbox/harmful/exposure.htm
"EH40/2005 Workplace exposure limits". http://www.hse.gov.uk/pubns/books/eh40.htm
OES Occupational Exposure Standard Archived 2011-09-05 at the Wayback Machine http://hsis.ascc.gov.au/