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    • Validity in image-based research : a Delphi study 

      Gaede, Rolf Joachim (Stellenbosch : University of Stellenbosch, 2004-12)
      ENGLISH ABSTRACT: The area of study is the notion of validity in image-based research, i.e. research approaches where visual images such as photographs or video recordings form an integral part of one or more of the ...