WIA GC/1902/394 | Schwedeler-Meyer, Ernst to Warburg, Aby 15/10/1902 | on his career and vacancies in Berlin; Ludwig Kaemmerer, [Paul] Kristeller, Schweinmann... |
WIA GC/1925/106 | Bing, Gertrud to Warburg, Aby 18/05/1925 | she forwarded books to Franz Boas and Ernst von der Porten; the Züricher Zeitung will be sent to... |