UdG users
1965-01-18 Letter
1962-11-04 Letter
1960-06-14 Letter
1960-03-17 Letter
1959-10-22 Letter
1959-05-06 Letter
1959-01-09 Letter
1958-12-03 Letter
1958-08-20 Letter
1958-08-07 Letter
1957-10-30 Letter
1957-08-17 Letter
1957-06-13 Letter
1957-01-29 Letter
1956-04-05 Letter
1956-03-07 Letter
1956-02-03 Letter
1955-12-30 Letter