Cynthia J. Solomon, Seymour Papert. A case study of a young child doing turtle graphics in LOGO. In American Federation of Information Processing Societies: 1976 National Computer Conference, 7-10 June 1976, New York, NY, USA. Volume 45 of AFIPS Conference Proceedings, pages 1049-1056, AFIPS Press, 1976. [doi]
Abstract is missing.