Nathan Relles, Norman K. Sondheimer, Giorgio P. Ingargiola. Recent advances in user assistance. In Gregory A. Marks, Lorraine Borman, editors, Proceedings of the Joint Conference on Easier and More Productive Use of Computer Systems, CHI 1981, Part II: Human Interface and the User Interface, Ann Arbor, MI, USA, May 20-22, 1981. pages 1-5, ACM, 1981. [doi]
Abstract is missing.