| Identifier | Title | Date | Level of description | Other information | |
|---|---|---|---|---|---|
| SIK-ISEA, HNA 976.6.1 | Brief von Cuno Amiet an Johann Friedrich Büzberger | 18th Feb 1896 | Item | ||
| SIK-ISEA, HNA 976.6.2 | Brief von Emma Gugelmann an Johann Friedrich Büzberger | 25th Sep 1918 | Item | ||
| SIK-ISEA, HNA 976.6.3 | Brief von F. Vital (Sekretär Schweizerisches Departement des Innern) an Johann Friedrich Büzberger | 24th Jul 1918 | Item |
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