REPORT ON A VISUAL ACUITY SURVEY CONDUCTED AT S.A. LAND & EXPLORATION CO. LTD.
D000349:Africa; D000353:Africa, Southern; D006801:Humans; D008906:Mining; D009787:Occupational Medicine; D014787:Vision Tests; D014792:Visual Acuity
AFRICA, SOUTHERN; INDUSTRIAL MEDICINE; MINING; VISION TESTS