1.
Success of marriage in the Netherlands, 1983
2.
Culturele Veranderingen in Nederland 1974 - CV'74 ; Cultural changes in the Netherlands - CV'74 1974
3.
4.
5.
Culturele Veranderingen in Nederland 1991 - CV'91 ; Cultural changes in the Netherlands 1991 - CV'91
Culturele Veranderingen in Nederland 1986 - CV'86 ; Cultural changes in the Netherlands 1986 - CV'86
Culturele Veranderingen in Nederland 1987 - CV'87 ; Cultural changes in the Netherlands 1987 - CV'87