TY  - JOUR
AU  - Y. Sugai
AU  - K. Suzuki 
TI  - Change over Time in Spatial Ability of Students Entering University -- Impact of Revision of National Curriculum Guidelines up to High Schools
JO  - Journal for geometry and graphics
PY  - 2011
SP  - 101
EP  - 112
VL  - 15
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/JGG_2011_15_1_JGG_2011_15_1_a7/
ID  - JGG_2011_15_1_JGG_2011_15_1_a7
ER  -