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  • 2014 (xsd:gyear)
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  • 2014 (xsd:gyear)
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  • The effectiveness of mailed invitations for web surveys and the representativeness of mixed-mode versus internet-only samples (xsd:string)
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  • article (xsd:string)
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  • GESIS-GRIS (xsd:string)
  • In Survey Practice, 4(7), 1-9, 2014 (xsd:string)
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