WIA GC 1931/865 | Bing, Gertrud to Gronau, Georg 22/09/1931 | |
WIA GC 1931/866 | Bing, Gertrud to Gronau, Georg 05/10/1931 | |
WIA GC 1932/953 | Bing, Gertrud to Gronau, Georg 06/02/1932 | |
WIA GC 1932/954 | Gronau, Georg to Bing, Gertrud 29/02/1932 | |
WIA GC 1932/955 | Gronau, Georg to Bing, Gertrud 15/02/1932 | |