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Are you Calum E Douglas, author of the books below?
The Secret Horsepower Race by Calum E Douglas The Secret Horsepower Race. Special Edition by Calum E Douglas Messerschmitt Me 309 Development & Politics by Calum E Douglas The Secret Horsepower Race - Special Edition by Calum E Douglas Turbo/Supercharger Compressors and Turbines for Aircraft Prop... by Karl Kollman


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