Goates, Gary B.; Griss, Martin L. and Herron, Gary J. "PICTUREBALM: A LISP-based graphics language system with flexible syntax and hierarchical data structure" pp93-99

[Proceedings] (1980) Computer Graphics Volume 14, Number 3, July, 1980 (Proceedings of the 7th International Conference on Computer Graphics and Interactive Techniques Seattle, Washington, United States SIGRAPH 80)  

Languages mentioned PICTUREBALM {1980}