Items where Author is "Frerichs, R"
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Lugtig, PJ and Lensvelt-Mulders, GJLM and Frerichs, R and Greven, A (2011) Estimating nonresponse bias and mode effects in a mixed mode survey. International Journal of Market Research, 53 (5). pp. 669-686. DOI https://doi.org/10.2501/ijmr-53-5-669-686