UdG users
1935-11-23 Letter
1936-01-07 Letter
1936-01-15 Letter
1936-01-25 Letter
1936-01-28 Letter
1936-05-13 Letter
1940-01-12 Letter
1940-07-29 Letter
1940-08-07 Letter
1940-09-18 Letter
1940-10-31 Letter
1941-04-15 Letter
1941-06-17 Letter
1941-09-01 Letter
[1943]-05-07 Letter
1943-09-07 Letter
1943-09-19 Letter
1943-10-16 Letter
1943-11-07 Letter
1944-02-28 Letter