UdG users
2002-07-26 Letter
2002-02-26 Letter
2001-04-03 Letter
1999-03-05 Letter
1999-01-22 Letter
1998-01-22 Letter
1997-07-27 Letter
1997-07-14 Letter
1997-07-04 Letter
1996-01-01 Article
1995-10-15 Letter
1993-04-01 Letter
1992-04-29 Letter
1990-12-10 Letter
1990-10-01 Letter
1989-06-05 Letter
1988-07-20 Letter
1987-04-06 Letter
1986-06-25 Letter
1983-07-05 Letter
1976-04-26 Letter
1972-05-18 Letter
[1963?] Letter
[1964?] Letter