UdG users
1956-08-22 Letter
1957-06-14 Letter
1957-07-13 Letter
1958-07-23 Letter
1958-08-14 Letter
1958-08-19 Letter
1958-09-18 Letter
1958-09-20 Letter
1958-09-23 Letter
1958-10-05 Letter
1958-10-23 Letter
1958-11-17 Letter
1958-11-24 Letter
1958-12-06 Letter
1958-12-19 Letter
1959-01-03 Letter
1959-01-23 Letter
1959-01-28 Letter
1959-02-02 Letter
1959-03-03 Letter
1959-03-17 Letter
1959-03-22 Letter
1959-04-09 Letter
1959-05-27 Letter