- Author: Ernst Mummenhoff (ed.)
- Language: German
- Year: 1918
- Author: Ernst Mummenhoff (ed.)
- Language: German
- Year: 1919
- Author: Ernst Mummenhoff (ed.)
- Language: German
- Year: 1915
- Author: Ernst Mummenhoff (ed.)
- Language: German
- Year: 1913
- Author: Ernst Mummenhoff (ed.)
- Language: German
- Year: 1908
- Author: Ernst Mummenhoff (ed.)
- Language: German
- Year: 1911
- Author: Ernst Mummenhoff (ed.)
- Language: German
- Year: 1906
- Author: Ernst Mummenhoff (ed.)
- Language: German
- Year: 1904
- Author: Ernst Mummenhoff (ed.)
- Language: German
- Year: 1902
- Author: Ernst Mummenhoff (ed.)
- Language: German
- Year: 1899