WIA GC/1905/434 | Oppenheimer, Franz to Warburg, Aby 12/04/1905 | as he had to depart early he could not visit Warburg or wait for his phone call; asks Warburg to... |
WIA GC/1905/435 | Warburg, Aby to Oppenheimer, Franz 13/04/1905 | Warburg and his brother Max wanted to talk to Oppenheimer after his lecture; Max is interested in... |