UdG users
1976-12-12 Letter
1971-12-17 Letter
1971-10-29 Letter
1971-09-13 Letter
1970-03-09 Letter
1968-08-05 Letter
1967-03-20 Letter
1966-12-?? Letter
1966-05-02 Letter
1965-09-08 Letter
1965-08-08 Letter
1963-12-10 Letter
1962-12-28 Letter
1961-05-24 Letter
1960-04-12 Letter
1960-01-13 Letter
1959-10-29 Letter
1959-08-09 Letter
1959-04-28 Letter
1958-10-16 Letter
1958-04-18 Letter
1958-01-16 Letter
1957-12-17 Letter
1957-10-16 Letter