LEGO MOC AT-AT WALK3R (31313 Mindstorms EV3) by jpgon | Rebrickable - Build with LEGO
LEGO® MINDSTORMS® EV3 : Robot-Advance's Guide
The LEGO MINDSTORMS EV3 Laboratory: Build, Program, and Experiment with Five Wicked Cool Robots: Benedettelli, Daniele: 9781593275334: Amazon.com: Books