Qudral 1976

Qudral 1980

Qudral 1980-81 Programm

Qudral 1982

Qudral 1985

Qudral 1992

Qudral 1993 Phonologue E

Qudral 1993 Phonologue S Phonologue C

Qudral 1996

Qudral Titan Test