WIA FC/1929/17/1 | Warburg, Aby to Warburg, Paul 23/01/1929 | thanks him for New Year greetings; he would have replied earlier, but had to prepare his lecture... |
WIA GC/1915/917 | Zoege von Manteuffel, Kurt Nikolaus to Warburg, Aby 19/04/1915 | he was not able to meet Giulio Panconcelli-Calzia, at the railway station; reports on the second... |