@book{Dietrich1994,
  author    = {Dietrich, Volkmar},
  title     = {Formeln und Tabellen f{\"u}r die Sekundarstufen I und II},
  publisher = {Paetec, Ges. f{\"u}r Bildung und Technik},
  address   = {Berlin},
  year      = {1994},
  language  = {de}
}
@book{Dietrich1994,
  author    = {Dietrich, Volkmar},
  title     = {Rahmenplan Biologie, Chemie, Physik : zweiter Bildungsweg},
  publisher = {Ministerium f{\"u}r Bildung, Jugend und Sport des Landes Brandenburg},
  address   = {Potsdam},
  year      = {1994},
  language  = {de}
}
@book{Dietrich1994,
  author    = {Dietrich, Volkmar},
  title     = {Chemie : Arbeitsheft Klasse 8 ; Gymnasium Sachsen},
  editor    = {Dietrich, Volkmar},
  publisher = {Paetec, Ges. f{\"u}r Bildung und Technik},
  address   = {Berlin},
  year      = {1994},
  language  = {de}
}
@book{Dietrich1994,
  author    = {Dietrich, Volkmar},
  title     = {Chemie : Arbeitsheft Klasse 8 ; Mittelschule Sachsen},
  editor    = {Dietrich, Volkmar},
  publisher = {Paetec, Ges. f{\"u}r Bildung und Technik},
  address   = {Berlin},
  year      = {1994},
  language  = {de}
}
@book{Dietrich1994,
  author    = {Dietrich, Volkmar},
  title     = {L{\"o}sungsheft zum Chemie-Arbeitsheft Klasse 8 : Gymnasium Sachsen},
  editor    = {Dietrich, Volkmar},
  publisher = {Paetec, Ges. f{\"u}r Bildung und Technik},
  address   = {Berlin},
  year      = {1994},
  language  = {de}
}
@book{Dietrich1994,
  author    = {Dietrich, Volkmar},
  title     = {L{\"o}sungsheft zum Chemie-Arbeitsheft Klasse 8 : Mittelschule Sachsen},
  editor    = {Dietrich, Volkmar},
  publisher = {Paetec, Ges. f{\"u}r Bildung und Technik},
  address   = {Berlin},
  year      = {1994},
  language  = {de}
}