Tokyo: Charles E. Tuttle Company, 1959. A 23.5x17 inch light bristolboard leaf folded four times to make a pocket-carry reference; the graphic (slightly smaller than leaf) is printed in colors. Rather worn and handled but remains generally sound; there are incipient foldline splits but none greater than one 16th inch, expect tiny perforations at foldline intersections, this a good (good-only) copy. Ready to use! (in 1959).