Source: Holger Damgaard, French uniform with gas mask, 1915. Royal Library, Copenhagen, http://www.kb.dk/images/billed/2010/okt/billeder/object140232/en/. Photoshopped.
Source: Holger Damgaard, French uniform with gas mask, 1915. Royal Library, Copenhagen, http://www.kb.dk/images/billed/2010/okt/billeder/object140232/en/. Photoshopped.