Factors that influence simple lung function tests with special reference to ethnic factors Author: Sluis-Cremer GK. Source: Proceedings of the Mine Medical Officer’ Ass LIV. 1974; 419:15-20. Babalwa Jekwa2019-04-11T00:43:02+02:00Dec 31st, 1974| Share This Page, Choose Your Platform! FacebookTwitterLinkedInWhatsappEmail