@book{GrassmannKlunterKoehleretal.2002,
  author    = {Marianne Grassmann and Martina Klunter and Egon K{\"o}hler and Elke Mirwald and Monika Raudies and Oliver Thiel},
  title     = {Mathematische Kompetenzen von Schulanf{\"a}ngern : Teil 1; Kinderleistungen - Lehrererwartungen},
  volume    = {30},
  isbn      = {3-935924-51-7},
  year      = {2002},
}