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Uniforms and Personal Gear - Gas Mask Hood | Canada and the First World War
WWI gas mask | Bullock Texas State History Museum
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First World War gas mask - Stock Image - C011/4289 - Science Photo Library
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Gas Warfare in the First World war: Gas Masks and Gas Defence Equipment of the Armies of the German Empire, Austria-Hungary and Italy: Egidio Rossi, Marco Pisani, Andrea Brambilla, Ariberto Osio: 9783903341173: