- Parts of this work are publicly available1930 - 1949
- Frankfurt am Main, 05/03/1930
- Frankfurt am Main, 03/03/1930
- Frankfurt am Main, 18/02/1930
- The Document may only be accessed from the library's premises11.12.1930
- The Document may only be accessed from the library's premises1930 - 1973
- The Document may only be accessed from the library's premises1930 - 1931
- The Document may only be accessed from the library's premises1930 - 1931
- Deutsch-Ostafrika; Tanganjika; Tanzania, 1930 (?)
- The Document may only be accessed from the library's premises1930 - 1931
- The Document may only be accessed from the library's premises11.04.1930