TY - JOUR AU - C. Leopold AU - R. A. Gorska AU - S. A. Sorby TI - International Experiences in Developing the Spatial Visualization Abilities of Engineering Students JO - Journal for geometry and graphics PY - 2001 SP - 081 EP - 092 VL - 5 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/JGG_2001_5_1_a8/ ID - JGG_2001_5_1_a8 ER -