http://digfir-published.macmillanusa.com/hlw_2D_animation/animation_01_1603.html
Chapter
1. Segregation
5838bb5d757a2e3874000001
http://digfir-published.macmillanusa.com/hlw_2D_animation/animation_01_1603_dlap.xmlDLAP questions5838bb5d757a2e3874000001