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viii. BALLOONS, DIRIGIBLES, 

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Hoernes, H. A Compendium of 

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Pratt , H . B . Commercial Airships . 

 8vo. Pp.250. 1920. Nelson. 15s. 



Summer, P. H. The Design and 

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Talbot , F . A . Aeroplanes and Dirig- 

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Whale, G. British Airships: Past, 

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