Emil J. Widmer

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Books by Emil J. Widmer

Military Observation Balloons (Captive and Free): A Complete Treatise on their Manufacture, Equipment, Inspection, and Handling, with Special Instructions for the Training of a Field Balloon Company (WWI Centenary Series)Emil J. Widmer
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Cover for Military Observation Balloons (Captive and Free): A Complete Treatise on their Manufacture, Equipment, Inspection, and Handling, with Special Instructions for the Training of a Field Balloon Company (WWI Centenary Series)

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