Robert P. Futrelle, G. Barta. Towards the design of an intrinsically graphical language. In S. H. Chasen, Richard L. Phillips, editors, Proceedings of the 5th Annual Conference on Computer Graphics and Interactive Techniques, SIGGRAPH 1978, Atlanta, GA, USA, August 23-25, 1978. pages 28-32, ACM, 1978. [doi]
Abstract is missing.