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Karel J Robot: A Gentle Introduction to the Art of Object-Oriented Programming in Java: Bergin, Joseph, Stehlik, Mark, Roberts, Jim, Pattis, Richard: 9780970579515: Amazon.com: Books
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Karel The Robot: A Gentle Introduction to the Art of Programming: Pattis, Richard E., Roberts, Jim, Stehlik, Mark: 9780471597254: Amazon.com: Books
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Karel the Robot: A Gentle Introduction to the Art of Programming: Pattis, Richard E.: 9780471089285: Amazon.com: Books
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