WIA GC 1932/2426 | Saxl, Fritz to Petersen, Carl Wilhelm 22/12/1932 | |
WIA GC/11913 | Warburg, Aby to Petersen, Carl Wilhelm 13/07/1913 | instructs him to start court procedures requesting the return of photographic plates |
WIA GC/11983 | Warburg, Aby to Petersen, Carl , Nottebohm, H and Petersen, G. 14/12/1913 | on the court case against Schaul; supplies figures |
WIA GC/121 | Stuck, Wilhelm to Warburg, Aby 28/07/1917 | he would prefer it if the estate of his brother-in-law [Robert Münzel] would be wound up... |
WIA GC/12314 | Warburg, Aby to Naumann, Friedrich 20/03/1916 | his friend Carl [Wilhelm] Petersen told him of Naumann's illness; sends his wishes for speedy... |