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Space Shuttle Mission STS-61: Hubble Space Telescope Servicing Mission-01
Nicolaus August Otto, Rudolf Diesel
Gottlieb Daimler : Fabriken, Banken und Motoren
Ernst Heinkel: Milestones in His Life Ernst Heinkel: Meilensteine an Seinem Lebensweg
Diesel : technology and society in industrial Germany
Diesel : technology and society in industrial Germany