1.
Culturele Veranderingen in Nederland 1989 - CV'89 ; Cultural changes in the Netherlands 1989 - CV'89
Culturele Veranderingen in Nederland 1985 - CV'85 ; Cultural changes in the Netherlands 1985 - CV'85
Culturele Veranderingen in Nederland 1980 - CV'80 ; Cultural changes in the Netherlands 1980 - CV'80