@book{GrassmannKlunterKoehleretal.2005,
  author    = {Grassmann, Marianne and Klunter, Martina and K{\"o}hler, Egon and Mirwald, Elke and Raudies, Monika},
  title     = {Kinder wissen viel : Auch {\"u}ber die Gr{\"o}ße Geld? ; Teil 1},
  series = {Potsdamer Studien zur Grundschulforschung},
  volume    = {32},
  journal   = {Potsdamer Studien zur Grundschulforschung},
  publisher = {Univ.-Verl.; Universit{\"a}tsbibliothek},
  address   = {Potsdam; Potsdam},
  isbn      = {3-937786-60-0},
  issn      = {0945-6643},
  pages     = {68 S.},
  year      = {2005},
  language  = {de}
}
@book{KlunterRaudies2005,
  author    = {Klunter, Martina and Raudies, Monika},
  title     = {Einsteins Mathemerkheft : Grundschulwissen Mathematik 1 bis 4},
  publisher = {Schroedel},
  address   = {Braunschweig},
  isbn      = {3-507-75231-X},
  year      = {2005},
  language  = {de}
}
@article{KlunterRaudies2005,
  author    = {Klunter, Martina and Raudies, Monika},
  title     = {K{\"a}fer Kunis Knobeleien},
  year      = {2005},
  language  = {de}
}
@article{KlunterRaudies2005,
  author    = {Klunter, Martina and Raudies, Monika},
  title     = {Sachrechnen und Differenzierung},
  year      = {2005},
  language  = {de}
}
@article{KlunterRaudiesKoehler2005,
  author    = {Klunter, Martina and Raudies, Monika and K{\"o}hler, Egon},
  title     = {Veranschaulichungen beim L{\"o}sen von Sachaufgaben-Beobachtungen bei Vierkl{\"a}sslern},
  year      = {2005},
  language  = {de}
}
@article{KoehlerKlunterRaudies2005,
  author    = {K{\"o}hler, Egon and Klunter, Martina and Raudies, Monika},
  title     = {Veranschaulichungen beim L{\"o}sen von Sachaufgaben : Beobachtungen bei Viertkl{\"a}sslern},
  year      = {2005},
  language  = {de}
}