WIA GC 1930/2997
Bing, Gertrud to Schumacher, Fritz 04/11/1930
WIA GC 1932/2849
Schumacher, Fritz to Saxl, Fritz 19/02/1932
WIA GC 1932/2850
KBW to Schumacher, Fritz 22/02/1932
WIA GC 1933/2669
Saxl, Fritz to Schumacher, Friedrich 06/05/1933
WIA GC 1933/2670
Schumacher, Fritz to Saxl, Friedrich [after 06/05/1933]
[reply to Saxl, Fritz to Schumacher, Friedrich 06/05/1933]