UdG users
1976-02-05 Letter
1981-03-31 Letter
1987-06-24 Letter
s.d. Letter
1988-11-23 Letter
1989-03-18 Letter
1989-03-20 Letter
1989-04-26 Letter
1989-05-18 Letter
1989-08-15 Letter
1989-09-15 Letter
1989-09-24 Letter
1989-10-24 Letter
1989-12-17 Letter
1990-01-10 Letter
1990-01-26 Letter
1990-03-06 Letter
1990-03-21 Letter
1990-05-07 Letter
1990-06-06 Letter
1990-06-10 Letter
1990-09-26 Letter
1990-12-14 Letter