TY  - BOOK
AU  - Husen Torsten
TI  - International study of achievement in mathematics :  a comparison of twelve countries volume II
T2  - International project for the evaluation of educationan achievement (IEA)
U1  - B, K7 
PY  - 1967///
CY  - Stockholm
PB  - Almqvist & Wiksell     
KW  - MATHEMATICS
ER  -