http://www.sgi.com/products/appsdirectory.dir/DeveloperIXGravity_International.html
(Silicon Surf Promotional CD, 01/1995)
Gravity International
Virtual Reality Entertainment Content
http://www.sgi.com/products/appsdirectory.dir/DeveloperIXGravity_International.html (Silicon Surf Promotional CD, 01/1995)