- Author: Dipl.-Ing. Hans Rögnitz (auth.)
- Language: German
- Year: 1944
- Author: Dipl.-Ing. Erich Krabbe (auth.)
- Language: German
- Year: 1936
- Author: Prof. Dr. techn. Erdmann Kothny (auth.)
- Language: German
- Year: 1926
- Author: J. Dinnebier (auth.)
- Language: German
- Year: 1936
- Author: Dr. Fritz Spitzer (auth.)
- Language: German
- Year: 1936
- Author: Ing. Rud. Hesse (auth.)
- Language: German
- Year: 1939
- Author: Ing. Rudolf Hesse (auth.)
- Language: German
- Year: 1943
Oel im Betrieb
pdf
- Author: Dr.-Ing. Karl Krekeler (auth.)
- Language: German
- Year: 1932
Öl im Betrieb
pdf
- Author: Dr.-Ing. habil Karl Krekeler (auth.)
- Language: German
- Year: 1943
- Author: Dr.-Ing. Reinhold Hinzmann (auth.)
- Language: German
- Year: 1942