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    • Internet, phone, mail, and mixed-mode surveys : the tailored design method 

      Dillman, Don A.; Smyth, Jolene D.; Christian, Leah Melani (John Wiley & Sons, Inc., 2014)
      "The classic survey design reference, updated for the digital agefor over two decades, Dillman's classic text on survey design has aided both students and professionals in effectively planning and conducting mail, telephone, ...