UdG users
1981-11-23 Letter
1981-12-03 Letter
1984-10-18 Letter
1984-10-28 Letter
1984-11-12 Letter
1984-11-23 Letter
1984-12-03 Letter
1984-12-30 Letter
1985-01-14 Letter
1985-01-23 Letter
1985-02-25 Letter
1985-03-14 Letter
1986-03-11 Letter
1986-07-07 Letter
1986-10-22 Letter
1986-11-14 Letter