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              Van de Vijver, F. J.R. (2003). Bias and Substantive Analysis. In J. A. Harkness & F. J.R. Van de Vijver (Eds.), Cross-Cultural Survey Methods (pp. 207-233). New York: Wiley. Links to websites Afrobarometer. http://www.afrobarometer.org/ Eurobarometer. http://europa.eu.int/comm/public_opinion/index_en.htm
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              van de Vijver, F. J. R. (2003b). Bias and Substantive Analyses. In J. Harkness, F. J. R. van de Vijver & P. Ph. Mohler (Hrsg.), Cross-Cultural Survey Methods, (207-233).
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              van de Vijver, F. J. R. 2003. "Bias and Substantive Analyses." Pp. 207-246 in Cross- Cultural Survey Methods, edited by Harkness, J. A., F. J. R. van de Vijver, and P. Ph. Mohler. Hoboken: Wiley.
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              van de Vijver, F. J. R. 2003. "Bias and Substantive Analysis." Pp. 207-233 in Cross- Cultural Survey Methods, edited by Harkness, J. A., F. J. R. van de Vijver, and P. Ph. Mohler. Hoboken, New York: Wiley Interscience.
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