UdG users
1985-08-12 Letter
1982-03-11 Letter
1981-05-18 Letter
1979-12-18 Letter
1978-04-13 Letter
1978-03-29 Letter
1978-03-14 Letter
1978-02-27 Letter
1977-08-25 Letter
1976-12-20 Letter
1976-01-06 Letter
1975-06-04 Letter
1975-04-14 Letter
1975-02-06 Letter
1975-01-29 Letter
1974-12-17 Letter
[1974-11] Letter
1974-10-09 Letter
1974-09-06 Letter
1974-08-30 Letter
1974-06-19 Letter
1974-05-27 Letter
1973-02-21 Letter
1970-01-13 Letter