UdG users
1930-12-13 Letter
1931-02-03 Letter
1931-03-28 Letter
1931-03-31 Letter
1931-04-08 Letter
1931-07-29 Letter
1931-09-27 Letter
1931-09-28 Letter
1931-09-29 Letter
1931-10-13 Letter
1931-11-04 Letter
1931-11-11 Letter
1931-11-29 Letter
1932-01-13 Letter
1932-09-13 Letter
1932-09-28 Letter
1932-10-05 Letter
1932-11-05 Letter
1933-07-01 Letter
1933-10-20 Letter
1933-10-24 Letter
1934-12-29 Letter
1935-01-11 Letter
1935-01-12 Letter