Der Frontalunterricht. Rosenbach, M. 1, 2002.
Der Frontalunterricht [link]Paper  bibtex   
@misc{Rosenbach2002,
  author    = {Manfred Rosenbach},
  title     = {{Der Frontalunterricht}},
  year      = 2002,
  month     = 1,
  url={http://metager.to/4olcv},
  urldate={2016-09-29},
}

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