- Author: Professor Dr. Emil Lehnartz (auth.)
- Language: German
- Year: 1943
- Author: Professor Dr. Emil Lehnartz (auth.)
- Language: German
- Year: 1939
- Author: Professor Dr. Emil Lehnartz (auth.)
- Language: German
- Year: 1943
- Author: Professor Dr. Emil Lehnartz (auth.)
- Language: German
- Year: 1949
- Author: Professor Dr. Emil Lehnartz (auth.)
- Language: German
- Year: 1938
- Author: Professor Dr. Emil Lehnartz (auth.)
- Language: German
- Year: 1943
- Author: Professor Dr. Emil Lehnartz (auth.)
- Language: German
- Year: 1959
- Author: Professor Dr. Emil Lehnartz (auth.)
- Language: German
- Year: 1952
- Author: Professor Dr. Emil Lehnartz (auth.)
- Language: German
- Year: 1943
- Author: Professor Dr. Emil Lehnartz (auth.)
- Language: German
- Year: 1943