Kugelfunktionen
pdf
- Author: Josef Lense
- Language: German
- Year: 1950
- Author: Ernst Schmutzer
- Language: German
- Year: 1968
- Author: Helmut Pitsch
- Language: German
- Year: 1951
- Author: Eugen Fick
- Language: German
- Year: 1981
Graptolithen
djvu
- Author: Rudolf Hundt
- Language: German
- Year: 1953
- Author: Heinrich Remy
- Language: German
- Year: 1967
- Author: Heinrich Remy
- Language: German
- Year: 1973
- Author: Rudolf Kochendörffer
- Language: German
- Year: 1966
- Author: Rudolf Kochendörffer
- Language: German
- Year: 1966