A survey of pulmonary function in male office workers Authors: Zwi S, Sluis-Cremer GM, du Preez L. Source: Medical Proceedings. 1967; 13 no 23:569-574 Babalwa Jekwa2019-04-10T23:33:36+02:00Dec 31st, 1967| Share This Page, Choose Your Platform! FacebookTwitterLinkedInWhatsappEmail