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)

• Voelcker, H. et al (1978) Voelcker, H. et al "The PADL-1.0/2 system for defining and displaying solid objects" pp257-263
• Goates, Gary B.; Griss, Martin L. and Herron, Gary (1980) 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
• Levin, Joshua Z.; (1980) Levin, Joshua Z.; "QUADRIL: A Computer Language for the Description of Quadric-Surface Bodies"
• Tsurutani, T.; and Kasahara, Y.; and Naniwada, M.; (1980) Tsurutani, T.; and Kasahara, Y.; and Naniwada, M.; "ATLAS: A geographic database system - data structure and language design for geographic information"
• O'Donnell, T. and Olson, A., (1981) O'Donnell, T. and Olson, A., "GRAMPS - A Graphics Language Interperter for Real-Time Interactive Three-Dimensional Picture Editing and Animation" pp133-142