title: A survey of underground illumination and visual acuity of the Bantu in the South African gold mining industry.
mesh_terms: D001741:Black or African American; D044383:Black People; D003118:Color Perception; D003623:Dark Adaptation; D006046:Gold; D006801:Humans; D008029:Lighting; D008297:Male; D008875:Middle Aged; D008906:Mining; D009787:Occupational Medicine; D013019:South Africa; D014792:Visual Acuity
chemical_list: D006046:Gold