Journal Article The Impact of Contact Type on Web Survey Response Rates Get access STEPHEN R. PORTER, STEPHEN R. PORTER Search for other works by this author on: Oxford Academic Google Scholar MICHAEL E. WHITCOMB MICHAEL E. WHITCOMB Search for other works by this author on: Oxford Academic Google Scholar Public Opinion Quarterly, Volume 67, Issue 4, February 2003, Pages 579–588, https://doi.org/10.1086/378964 Published: 01 February 2003
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Porter et al. (2003) studied this question.
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