Pattis, Richard E. Karel the robot : a gentle introduction to the art of programming / Richard E. Pattis. - 2nd ed. / revision by Jim Roberts, Mark Stehlik. - New York : Wiley, c1995. - xiii, 160 p. : ill. ; 23 cm. Includes indexes. ISBN: 0471597252 LCCN: 94008087 Subjects--Topical Terms: Computer programming. Dewey Class. No.: 005.1