Ludwig Speidel
![Ludwig Speidel, ca. 1900](https://upload.wikimedia.org/wikipedia/commons/4/4f/Ludwig_Speidel_%281830%E2%80%931906%29_um_1900.jpg)
1
2
Published: 1989
Superior document: Österreichische Bibliothek 11
3
Published: 1911
Superior document: Ludwig Speidels Schriften 3
4
Published: 1910
Superior document: Ludwig Speidels Schriften 2
5
Published: 1910
Superior document: Ludwig Speidels Schriften 1