- Wohlfahrts Surveys, 1978, 1980,1982, 1988. (Well-Being Surveys, 1978, 1980, 1982, 1988).
- ZUMA, Unpublished Data Set. Especially prepared for the World Database of Happiness, (eHero Institute, Erasmus University Rotterdam), 1989, Manheim, Germany
Eligible for inclusion in findings archive
- Yes, but not yet entered.