http://www.sgi.com/tech/openGL/mjk.intro/section3_6.html (Silicon Surf Promotional CD, 01/1995)
The best place to find more information about graphics programming using OpenGL is the OpenGL Technical Library published by Addison-Wesley. Currently available is the OpenGL Reference Manual [6] and the OpenGL Programming Guide [5]. The first volume contains complete descriptions of all the OpenGL routines including the GLU and GLX routines. The second volume is an excellent introduction to OpenGL including all its advanced rendering features.
Those with Internet access can obtain OpenGL documentation and sample program source code by using anonymous ftp to sgi.com. PostScript documentation for all the routines that are part of the OpenGL, GLU, and GLX APIs may be obtained. Example code from the OpenGL Programming Guide (including the aux library) is also available.
Of course the best way to learn OpenGL is to program with it. Systems supporting OpenGL are currently shipping from a number of workstation hardware and software vendors. Check with your vendor for availability.