doi:10.7916/d8-jabd-sk34Signboard Outside Tibet Autonomus Region People's Defence Office, Depicting Written and Illustrated Instructions for Proper Usage of Gas Masks, as an Unmasked Tibetan Woman Sits Underneath Working on a Sewing Machine, Lhasa, 1993Tibet Information Networkphotographsstill imageSigns and signboardsSafety regulationsTibetansLhasa (China)Photograph of a signboard outside the TAR People's Defence Office, depicting written (in Tibetan and Chinese) and illustrated instructions for the required and proper usage of gas masks, as an unmasked Tibetan woman sits underneath working on a sewing machine.