@article{KahlertCechGiestetal.2004,
  author    = {Kahlert, Joachim and Cech, Diethard and Giest, Hartmut and Hempel, Marlies and Wittkowske, Steffen and Hartinger, Andreas},
  title     = {Sachunterricht nach PISA und IGLU},
  isbn      = {3-7065-4020- 7},
  year      = {2004},
  language  = {de}
}