Ivan B. Liss, Thomas C. McMillan. Trees - a CS2 programming project which introduces a data type using procedural and data abstraction. In A. K. Rigler, Daniel C. St. Clair, editors, Proceedings of the 18st SIGCSE Technical Symposium on Computer Science Education, 1987, St. Louis, Missouri, USA, February 19-20, 1987. pages 346-352, ACM, 1987. [doi]
Abstract is missing.