Bader, Felix; Bauer, Johannes; Kroher, Martina; Riordan, Patrick
(Mannheim : GESIS - Leibniz Institute for the Social Sciences, 2016)
Paper-and-pencil surveys are a widely used method for gaining data. Numeric codes printed on the questionnaire are often a prerequisite for the use of scan software, which, in turn, permits a fast and efficient entering ...