?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=+Balt+Miriam&rft.aufirst=Miriam&rft.aulast=Balt&rft.date=2015&rft.title=Early+detection+of+mathematical+learning+difficulties+in+the+context+of+internal+school+entry+tests+in+German+primary+schools&rft.genre=proceeding