UdG users
1961-07-29 Letter
1962-08-06 Letter
1959-06-09 Letter
1970-06-07 Letter
1958-03-23 Letter
1972-12-08 Letter
1958-10-19 Letter
1968-04-30 Letter
1964-09-06 Letter
1960-05-21 Letter
1973-07-02 Letter
1954-12-05 Letter
1966-09-03 Letter
1967-06-03 Letter
1952-12-29 Letter
1967-07-23 Letter
1965-12 Letter
1964-12-17 Letter
1959-12-24 Letter
1956-12-09 Letter
1957-07-04 Letter
1964-05-27 Letter
1959-05-23 Letter
1972-10-23 Letter