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by Haerpfer, Christian; Bernhagen, Patrick; Welzel, Christian; et al.
by Ronald Inglehart , Christian Welzel
by Dalton, Russell J.; Welzel, Christian
by Welzel, Christian
by Feld, Lars P.; Huber, Peter M.; Jung, Otmar; et al.
by Haerpfer, Christian W.; Bernhagen, Patrick; Inglehart, Ronald F.; et al.
by Welzel, Christian (CON)