Interaction of Color A Book by Josef Albers yalebooks.yale.edu The deception of colorPractice before theory50 redsNot the what but the howScotopic seeing+11 More Irwin Fluorescents colorgraphicscommunicationteaching
Each element performs many functions Each element in the system should be chosen and placed so that it performs as many functions as possible. Bill Mollison, Introduction to Permaculture The multiplicity of living patterns function