Historical perspectives in occupational medicine. Pneumoconiosis research in South Africa with emphasis on developments in the last quarter century. Authors: Sluis-Cremer GK. Source: Am J Ind Med. 1992; 22:591-603. Babalwa Jekwa2019-04-04T11:49:47+02:00Dec 31st, 1992| Share This Page, Choose Your Platform! FacebookTwitterLinkedInWhatsappEmail