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In doing a search on ProQuest Dissertation Publications, the number of dissertations for "Educational Technology historiography" was a total under 10. Why do you think this is so few?
Historiography as a dissertation process does not have a typical form or template as you may have seen with other qualitative dissertations. Each dissertation has an introducation, a literature review and a methodology chapter. In the historigraphic disseration, this information is provided in some form perhaps not individual chapters. In additons, the analysis and results chapters may take on a chronlogical, thematic or other method to share the information.