WIA FC/1930-94/75 | Warburg, Mary to Braden, Marietta [06/05/1934?] | Jan [Peter Jan Braden] wrote a letter, thanking for parcel; he gave her the letter and she copied... |
WIA GC 1930/1459 | Bing, Gertrud to Hertz, Wilhelm [?] 20/08/1930 | forwards a written request regarding the library that Hertz might be better equiped to answer |
WIA GC 1930/1460 | Bing, Gertrud to Hertz, Wilhelm 11/11/1930 | |
WIA GC 1931/1218 | Hertz, Wilhelm to Bing, Gertrud 20/01/1931 | |
WIA GC 1931/1219 | Bing, Gertrud to Hertz, Wilhelm 02/02/1931 | |