WIA FC/1921/20/17 | Warburg, Max to Warburg, Aby 27/06/1921 | has received his letter of 23/06/1921; Erich's letter to Aby was against instructions and Lola... |
WIA FC/1921/20/26 | Warburg, Max to Warburg, Aby 17/09/1921 | he returns to Aby a personnel form relating to his honorary professorship with instructions how... |
WIA GC 1930/3554 | Eckardt, Eva von to Warburg, Erich 02/08/1930 | |
WIA GC 1930/3555 | Warburg, Erich to Eckardt, Eva von 03/05/1930 | |
WIA GC 1930/3556 | Saxl, Fritz to Warburg, Erich 27/05/1930 | |