@misc
{TN_libero_mab2,
author = {
Hasemann, Klaus
},
title = {
Word problems and mathematical understanding : Results of a teaching experiment in grade 2
Results of a teaching experiment in grade 2
},
publisher = {Springer Science and Business Media LLC},
isbn = {1615-679X},
year = {2005},
url = {
http://slubdd.de/katalog?TN_libero_mab2
}
}