WIA GC/1912/873 | Rosenberg, Marc to Warburg, Aby 22/01/1912 | he has relinquished his chair at the university; he will be with his wife Mathilde Rosenberg in... |
WIA GC/1916/41 | Warburg, Aby to Bendixen, Fritz 31/07/1916 | on the report that poison gas bombs have been dropped over Karlsruhe; a cousin from Karlsruhe... |