TY  - BOOK
AU  - Pattis, Richard E. 
TI  - Karel the robot: a gentle introdcution to the art of programming 
SN  - 0-471-08928-1
PY  - 1981///
CY  - New York 
PB  - John Wiley and Sons
KW  - Computer programming
KW  - Robotics
ER  -