@book{Buerger1999,
  author    = {B{\"u}rger, Klaus},
  title     = {B{\"u}cherwurm - Mein Sprachbuch [2. Schuljahr] : Lehrerband ; Ausgabe B mit LA und VA f{\"u}r die L{\"a}nder Bremen, Hamburg, Hessen, Niedersachsen, Rheinland-Pfalz, Schleswig-Holstein, Saarland},
  editor    = {Ahlgrimm, Helga},
  publisher = {Klett},
  address   = {Leipzig},
  pages     = {94 S.},
  year      = {1999},
  language  = {de}
}
@book{Buerger1998,
  author    = {B{\"u}rger, Klaus},
  title     = {B{\"u}cherwurm - Mein Sprachbuch [2. Schuljahr] : [Sch{\"u}lerband] ; Ausgabe B mit LA und VA f{\"u}r die L{\"a}nder Bremen, Hamburg, Hessen, Niedersachsen, Rheinland-Pfalz, Schleswig-Holstein, Saarland},
  editor    = {Ahlgrimm, Helga},
  publisher = {Klett},
  address   = {Leipzig},
  pages     = {135 S.},
  year      = {1998},
  language  = {de}
}
@book{Buerger1998,
  author    = {B{\"u}rger, Klaus},
  title     = {B{\"u}cherwurm - Mein Sprachbuch [2. Schuljahr] : Mein Arbeitsheft ; Ausgabe Baden-W{\"u}rtemberg},
  editor    = {Ahlgrimm, Helga},
  publisher = {Klett},
  address   = {Leipzig},
  pages     = {48 S.},
  year      = {1998},
  language  = {de}
}
@book{Buerger1998,
  author    = {B{\"u}rger, Klaus},
  title     = {B{\"u}cherwurm - Mein Sprachbuch [2. Schuljahr] : [Sch{\"u}lerband]},
  editor    = {Ahlgrimm, Helga},
  publisher = {Klett},
  address   = {Leipzig},
  pages     = {135 S.},
  year      = {1998},
  language  = {de}
}
@book{Buerger1998,
  author    = {B{\"u}rger, Klaus},
  title     = {B{\"u}cherwurm - Mein Sprachbuch [2. Schuljahr] : [Sch{\"u}lerband] ; Ausgabe Baden-W{\"u}rtemberg},
  editor    = {Ahlgrimm, Helga},
  publisher = {Klett},
  address   = {Leipzig},
  pages     = {135 S.},
  year      = {1998},
  language  = {de}
}
@book{Buerger1997,
  author    = {B{\"u}rger, Klaus},
  title     = {B{\"u}cherwurm - Mein Sprachbuch [2. Schuljahr] : Lehrerband ; Ausgabe f{\"u}r Berlin, Brandenburg, Mecklenburg-Vorpommern, Sachsen, Sachsen-Anhalt},
  editor    = {Ahlgrimm, Helga},
  publisher = {Klett},
  address   = {Leipzig},
  pages     = {95 S.},
  year      = {1997},
  language  = {de}
}
@book{BuergerSaupe1996,
  author    = {B{\"u}rger, Klaus and Saupe, Gabriele},
  title     = {Geos : Lehrbuch Geographie ; Sekundarstufe II ; Bd. 1 Wirtschaftsr{\"a}ume und Siedlungen},
  editor    = {Friese, Heinz W. and Motschmann, Siegfried},
  publisher = {Volk und Wissen},
  address   = {Berlin},
  pages     = {256 S.},
  year      = {1996},
  language  = {de}
}
@book{BuergerSaupe1996,
  author    = {B{\"u}rger, Klaus and Saupe, Gabriele},
  title     = {Geos : Lehrbuch Geographie ; Sekundarstufe II ; Bd. 2 Landschaften und Ressourcen},
  editor    = {Friese, Heinz W. and Motschmann, Siegfried},
  publisher = {Volk und Wissen},
  address   = {Berlin},
  pages     = {256 S.},
  year      = {1996},
  language  = {de}
}