The term CIB Publications shall be exclusively understood to refer to documents etc. approved for publication according to the procedure set out in these Guidelines. Each forms part of the CIB Publication Series and will be distinguished by bearing a publication number and cover of agreed format. There are three main categories of CIB Publications: - CIB Working Papers - CIB Proceedings - CIB Reports Documents for publication will be assigned into one of these three categories according to their contents and the category to which each is so assigned will be stated on its cover.