Doomsday’ chimera or reality? Reply to letter by S Robertson re article of this title Authors: Walker ARP, Davies JCA. Source: S Afr Med J. 1991; 79:567. Babalwa Jekwa2019-04-03T11:46:25+02:00Dec 31st, 1991| Share This Page, Choose Your Platform! FacebookTwitterLinkedInWhatsappEmail