Richard Berman, Michael Stonebraker. GEO-OUEL: a system for the manipulation and display of geographic data. In James George, editor, Proceedings of the 4th Annual Conference on Computer Graphics and Interactive Techniques, SIGGRAPH 1977, San Jose, California, USA, July 20-22, 1977. pages 186-191, ACM, 1977. [doi]
Abstract is missing.