- Author: Dr. Phil. Dr.-Ing. E. H. Dr. Phys. E. H. Robert Wichard Pohl (auth.)
- Language: German
- Year: 1944
- Author: Robert Wichard Pohl Dr. Phil. Dr.-Ing. E. H. Dr. Phys. E. H. (auth.)
- Language: German
- Year: 1943
- Author: R. W. Pohl Dr.-Ing. e. h. (auth.)
- Language: German
- Year: 1927
- Author: R. W. Pohl (auth.)
- Language: German
- Year: 1927
- Author: Dr. Phil. Dr.-Ing. E. H. Dr. Phy. E. H. R. W. Pohl (auth.)
- Language: German
- Year: 1941
- Author: R. W. Pohl (auth.)
- Language: German
- Year: 1935
- Author: R. W. Pohl (auth.)
- Language: German
- Year: 1931
- Author: Dr. Wilhelm Spreen (auth.)
- Language: German
- Year: 1924
- Author: Dr. Wilhelm Spreen (auth.)
- Language: German
- Year: 1924