Willett Kempton. A system to make visible the structure and execution of student programs. In Joyce Currie Little, Lillian N. Cassel, editors, Proceedings of the 17st SIGCSE Technical Symposium on Computer Science Education, 1986, Cincinnati, Ohio, USA, February 6-7, 1986. pages 313-317, ACM, 1986. [doi]
Abstract is missing.