@book{BarceloBeetz1998,
  author    = {Barcel{\´o}, Pedro and Beetz, Petra},
  title     = {Expedition Geschichte : Regelschule Th{\"u}ringen ; Klasse 5 ; Bd. 1 Von der Urzeit bis zur Zeit der Griechen [Hauptband]},
  volume    = {1, Hauptbd. = 5. Kl},
  editor    = {Klose, Dagmar and Barcel{\´o}, Pedro},
  publisher = {Diesterweg},
  address   = {Frankfurt am Main},
  isbn      = {3-425-03401-4},
  pages     = {106 S.},
  year      = {1998},
  language  = {de}
}
@book{BarceloBeetzClauss1997,
  author    = {Barcel{\´o}, Pedro and Beetz, Petra and Clauss, Manfred},
  title     = {Expedition Geschichte : F{\"o}rderstufe Sachsen-Anhalt ; Klassen 5/6 ; Bd. 1 Von der Urzeit bis zum Ende des Mittelalters [Hauptband]},
  volume    = {1 = Kl. 5 und 6},
  editor    = {Klose, Dagmar and Barcel{\´o}, Pedro},
  publisher = {Diesterweg},
  address   = {Frankfurt am Main},
  isbn      = {3-425-03385-9},
  pages     = {244 S.},
  year      = {1997},
  language  = {de}
}
@article{Beetz1994,
  author    = {Beetz, Petra},
  title     = {Vergangenheit - Geschichte - Psyche : Tagungsbericht},
  year      = {1994},
  language  = {de}
}
@article{Beetz1998,
  author    = {Beetz, Petra},
  title     = {Die Habsburgermonarchie},
  year      = {1998},
  language  = {de}
}
@article{Beetz1997,
  author    = {Beetz, Petra},
  title     = {Die fr{\"u}hen Hochkulturen},
  isbn      = {3-425-03381-6},
  year      = {1997},
  language  = {de}
}
@article{Beetz1996,
  author    = {Beetz, Petra},
  title     = {Subjektive Komponenten von Raumvorstellungen},
  year      = {1996},
  language  = {de}
}
@article{Beetz1998,
  author    = {Beetz, Petra},
  title     = {Die fr{\"u}hen Hochkulturen : Altes {\"A}gypten und Mesopotamien},
  year      = {1998},
  language  = {de}
}
@article{Beetz1998,
  author    = {Beetz, Petra},
  title     = {Absolutismus in Deutschland},
  year      = {1998},
  language  = {de}
}
@article{Beetz1998,
  author    = {Beetz, Petra},
  title     = {Die fr{\"u}hen Hochkulturen - Altes {\"A}gypten und Mesopotamien},
  year      = {1998},
  language  = {de}
}
@article{Beetz1998,
  author    = {Beetz, Petra},
  title     = {Die fr{\"u}hen Hochkulturen - Altes {\"A}gypten und Mesopotamien},
  year      = {1998},
  language  = {de}
}