@book{DietrichDuvinageArndtetal.1997,
  author    = {Dietrich, Volkmar and Duvinage, Brigitte and Arndt, Barbara and Arnold, Karin and Boeck, Helmut and Block, Adolf and Brauer, Roland and Lange, P. and Meyendorf, Gerhard and Teichmann, Jochen and Wegner, Gerhard},
  title     = {Chemie : Stoffe, Reaktionen, Umwelt ; Ausgabe Brandenburg, Gesamtschule Realschule, 9/10, Arbeitsheft},
  publisher = {Volk und Wissen},
  address   = {Berlin},
  isbn      = {3-06-030927-2},
  year      = {1997},
  language  = {de}
}
@book{DietrichArndtBoecketal.1998,
  author    = {Dietrich, Volkmar and Arndt, Barbara and Boeck, Helmut and Brauer, Roland and Meyendorf, Gerhard and Teichmann, Jochen},
  title     = {Chemie : Stoffe, Reaktionen, Umwelt ; Ausgabe Mecklenburg-Vorpommern, Realschule, Gesamtschule, 8/9, Arbeitsheft},
  publisher = {Volk und Wissen},
  address   = {Berlin},
  isbn      = {3-06-030822-5},
  year      = {1998},
  language  = {de}
}