Respiratory symptoms and lung function in black and white mining and non-mining industrial workers in South Africa Author: Sluis-Cremer GK, Harrison WO, Pearson RCT. Source: South African Medical Journal. 1981; 59:672-675. Summary: NULL Babalwa Jekwa2019-04-05T22:38:07+02:00Dec 31st, 1981| Share This Page, Choose Your Platform! FacebookTwitterLinkedInWhatsappEmail