Books by Horst O. Hardenberg
The Middle Ages of the Internal-Combustion Engine, 1794-1886
The oldest precursor of the au
The oldest precursor of the automobile
The antiquity of the internal
The antiquity of the internal combustion engine, 1509-1688
The Niepce brothers' boat engi
The Niepce brothers' boat engines
Samuel Morey and his atmospheric engine
Schiesspulvermotoren
Schiesspulvermotoren