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              Lugtig, P., Toepoel, V., Haan, M., Zandvliet, R., & Klein Kranenburg, L. (2019). Recruiting hard-to-reach groups into a probability-based online panel by promoting smartphone use. Methods, data, analyses, 13, 291-306. https://doi.org/10.12758/mda.2019.04
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              Lugtig, P., Toepoel, V., Haan, M., Zandvliet, R., Kranenburg, L. (2019). Recruiting hard-to-reach groups into a probability-based online panel by promoting smartphone use. Methods, data, analyses, 13 pp. 291-306.
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