OpenGL(R) Programming Guide: The Official Guide to Learning OpenGL(R), Version 2.1 (6th Edition) Paperback - Aug 9, 2007
The OpenGL Graphics System: A Specification (Version 2.1) -July 30,2006
7th Edition V3.0 Aug 11, 2008
6th Edition Aug 9, 2007 V2.1 Jul 30, 2006
5th Edition Aug 11, 2005 V2.0 Oct 22, 2004
V1.5 Jul 29, 2003
4th Edition Nov 13, 2003 V1.4 Jul 24, 2002
V1.3 Aug 14, 2001
3rd Edition 1999 V1.2 Mar 16, 1998
OpenGL- Shading Language Feb 14, 2008
OpenGL(R) Shading Language (2nd Edition) Feb 4, 2006
3rd Edition V1.30 Aug 7, 2008
2nd Edition Feb 4, 2006 V1.20 Jul 31, 2006
1st Edition V1.10 Apr 30, 2004