WIA FC/1914/10/4 | Warburg, Max to Warburg, Aby 15/01/1914 | forwards Max Warburg's letter to B. Schädel, 06/01/1914, and copy of Max Warburg's reply to L... |
WIA FC/1914/10/5 | Warburg, Max to Warburg, Aby 21/01/1914 | forwards the letter by B. Schädel to Max Warburg, 19/01/1914 |
WIA GC/1911/619 | Perels, Kurt to Warburg, Aby 18/06/1911 | forwards a paper by Bernhard Schädel |
WIA GC/1911/845 | Warburg, Aby to Warburg, Max 25/09/1911 | detailed response to the 'Denkschrift', memorandum, re setting up university courses... |
WIA GC/1911/859 | Ziebarth, Erich to Warburg, Aby 14/07/1911 | thanks him for a copy of Warburg's article [Hausbuchmeister]; admires Warburg's persuasive... |