Each notebook has an elastic closure 228 pages with up to 44 pages in colours and have a sewn binding there is an inside accordion pocket and three ribbon placemarkers each in a different colour 9 x 14 cm 3 12 x 5 12 up to 36 pages of zone maps ranging in scale from 1 5 000 to 1 17 000 with large scale maps of the city center and an alphabetical street index the key map summarizes the overall layout of the city showing the sequence and location of the zone maps each book inclu