TY  - JOUR
AU  - S. A. Sorby 
TI  - Impact of Changes in Course Methodologies on Improving Spatial Skills
JO  - Journal for geometry and graphics
PY  - 2005
SP  - 99
EP  - 105
VL  - 9
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/JGG_2005_9_1_JGG_2005_9_1_a9/
ID  - JGG_2005_9_1_JGG_2005_9_1_a9
ER  -