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Charles Proteus Steinmetz (8)
Dr. Heinrich Kahr (auth.) (8)
Dr. Hermann Hager (auth.) (8)
Dr. Josef Kowarschik (auth.) (8)
Dr. Rudolf Gneist (auth.) (8)
Dr.-Ing. Carl Pirath (auth.) (8)
Eugen Kaczmarek (auth.) (8)
Florian Cajori (8)
Frederick Buechner (8)
Fritz Grünhagen (auth.) (8)