The Grid System – The Ultimate Resource In Grid Systems
http://www.thegridsystem.org/

Made popular by the International Typographic Style movement and pioneered by legends like Josef Müller-Brockmann and Wim Crouwel, the grid is the foundation of any solid design. The Grid System is an ever-growing resource where graphic designers can learn about grid systems, the golden ratio and baseline grids. Created by Antonio Carusone, graphic designer and author of the design and typography blog AisleOne with special thanks to Duane King for his help and wisdom. This has been added to World Wide Web Reference Subject Tracer™ Information Blog.