@book{BuderRichterWeinert2001,
  author    = {Buder, Margret and Richter, Dieter and Weinert, G.},
  title     = {Geografie : Arbeitsheft Klasse 5 ; Ausgabe Mecklenburg-Vorpommern},
  publisher = {Volk-und-Wissen-Verl.},
  address   = {Berlin},
  isbn      = {3-06-040574-3},
  pages     = {32 S.},
  year      = {2001},
  language  = {de}
}
@book{BuderRichterWeinert2001,
  author    = {Buder, Margret and Richter, Dieter and Weinert, G.},
  title     = {Geografie : Arbeitsheft Klasse 5 ; Ausgabe Sachsen},
  publisher = {Volk-und-Wissen-Verl.},
  address   = {Berlin},
  isbn      = {3-06-040573-5},
  pages     = {32 S.},
  year      = {2001},
  language  = {de}
}
@book{BuderRichterWeinert2001,
  author    = {Buder, Margret and Richter, Dieter and Weinert, G.},
  title     = {Geografie : Arbeitsheft Klasse 5 ; Ausgabe Th{\"u}ringen},
  publisher = {Volk und Wissen},
  address   = {Berlin},
  isbn      = {3-06-040575-2},
  year      = {2001},
  language  = {de}
}
@book{BuderDresslerKadenetal.2004,
  author    = {Buder, Margret and Dreßler, Jutta and Kaden, Klaus and Kulke, Elmar and L{\"u}dke, Norbert and Richter, Dieter and Vogt, J{\"u}rgen},
  title     = {Geografie : Hauptband Klasse 9/10 ; Ausgabe Brandenburg},
  publisher = {Cornelsen-Verl.},
  address   = {Berlin},
  isbn      = {3-06-040953-6},
  year      = {2004},
  language  = {de}
}
@book{BuderDresslerGewandetal.2004,
  author    = {Buder, Margret and Dreßler, Jutta and Gewand, Ulrich and Kaden, Klaus and L{\"u}dtke, Norbert and Richter, Dieter and Vogt, J{\"u}rgen and Weinert, Gudrun},
  title     = {Geografie : Hauptband Klasse 7 ; Ausgabe Sachsen},
  editor    = {Kulke, Elmar and Richter, Dieter},
  publisher = {Cornelsen},
  address   = {Berlin},
  isbn      = {3-06-040792-4},
  pages     = {144 S.},
  year      = {2004},
  language  = {de}
}