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A Comparison of Results from a Spanish and English Mail Survey: Effects of Instruction Placement on Item Missingness [journal article]
Source: Survey Methods: Insights from the Field, (2013). p.13
Ballpoint pens as incentives with mail questionnaires - results of a survey experiment [journal article]
Source: Methods, data, analyses : a journal for quantitative methods and survey methodology (mda), 10 (2016) 1. p.25-46