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Berliner Zinnfiguren | Rossi, Egidio/Pisani, Marco/Brambilla, Andrea/Osio, Ariberto: The Gas Warfare in the First World War. Gas protection and gas masks in the Armies of the German Empire, Austria, Hungary and Italy
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File:An Air Raid Warden wearing his steel helmet and duty gas mask during the Second World War. D4054.jpg - Wikimedia Commons
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