Toepoel, V., M. Das und A. van Soest, 2009: Relating Question Type to Panel Condition- ing: Comparing Trained and Fresh Respondents. Survey Research Methods 3 (2): 73-80.
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Toepoel, V., Das, M., Soest, A. (2009). Relating Question Type to Panel Condition- ing: Comparing Trained and Fresh Respondents. Survey Research Methods, 3(2), pp. 73-80.
(xsd:string)