Referate halten lernen. Knobloch, J. AOL-Verlag, Lichtenau, 1998.
bibtex   
@book{Knobloch1998,
  author    = {J{\"o}rg Knobloch},
  title     = {{Referate halten lernen}},
  year      = 1998,
  publisher = {AOL-Verlag},
  address   = {Lichtenau},
}

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