NWU library libguide - link to https://libguides.nwu.ac.za/c.php?g=469814&p=10460754   

IOHA (International Occupational Hygiene Association) – link to https://www.ioha.net/

SAIOH (Southern African Institute for Occupational Hygiene) – link to https://www.saioh.co.za/

DoEL (Department of Employment and Labour) – link to https://www.labour.gov.za/