Dillman, D. A., & Edwards, M. L. (2016). Designing a Mixed-Mode Survey. In C. Wolf, D. Joye, T. Smith & Y.
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Dillman, D. A., & Edwards, M. L. (2016). Designing a mixed-mode survey. In C. Wolf, D. Joye, T. W. Smith, & Y. Fu (Eds.), The Sage handbook of survey methodology (pp. 255-268). London
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