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[Balloon bulletins] (1918)
leaf 676
![An illustration from [Balloon bulletins], 1918, leaf 676](https://img.insideoutlibrary.com/img/1024/ia-balloonbulletins00-676-0.webp)
COMPOSITE SKELETON OR PERSPECTIVE OF GRILLE lt.l^.heath. PLATE VI. THE USE OF PARALLEL GRILLE.Balloons · Aeronautics, Military
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
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