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30-page typescript foolscap volume with photographs and plans pasted onto and between the pages.

This volume is one of a set of seven that records the damage caused by the Independent Force's bombing raids during 1918 and the enemy counter-measures that were encountered. This volume analyses German counter-measures to defend against air raids in the Independent Force's area of operations. The counter-measures studied were the German telephone communication system, the organisation and procedures for the warning of air raids, and anti-aircraft defence measures including AA guns, searchlights and balloon barrages.