Planned Link: Ruled Play and Safety in Design
Alexander, C., et al, A Pattern Language, Oxford University Press, New York, 1977.
A Pattern Language
Alexander, C., The Timeless Way of Building, Oxford University, New York, 1979.
A Timeless Way of Building (based on Pattern Language)
Planned Link: Christopher Alexanders Pattern language
Auxiliary Elements for document tc.genorg.gen.ruler.demiborg.htm
Part of Toolboxes and Treasure-chests.