1.		General tariff principles : charging and accounting in international telecommunication services: Series D recommendations / International Telecommunication Union Data Publicação: 1989 Tema: Vária
2.		Minutes and reports of the plenary assembly : list of study groups and questions under study / International Telecommunication Union Data Publicação: 1989 Tema: Vária
3.		Opinions and resolutions recommendations on the organization and working procedures of CCITT (series A) / International Telecommunication Union Data Publicação: 1989 Tema: Vária
4.		Terms and definitions abbreviations and acronyms : recommendations on means of expression (series B): general telecommunications statistics (series C) / International Telecommunication Union Data Publicação: 1989 Tema: Vária
5.		Index of blue book / International Telecommunication Union Data Publicação: 1989 Tema: Vária
6.		Message handling and directory services operations and definition of service : recommendations F.400 - F.422, F.500 / International Telecommunication Union Data Publicação: 1989 Tema: Vária
7.		International analogue carrier systems : recommendations G.211 - G.544 / International Telecommunication Union Data Publicação: 1989 Tema: Vária
8.		Transmission media characteristics : recommendations G.601 - G.654 / International Telecommunication Union Data Publicação: 1989 Tema: Vária
9.		General aspects of digital transmission systems : terminal equipments: recommendations G.700 - G.795 / International Telecommunication Union Data Publicação: 1989 Tema: Vária
10.		Line transmission of non-telephone signals : transmission of sound-programme and television signals: series H and J recommendations / International Telecommunication Union Data Publicação: 1989 Tema: Vária
11.		Integrated services digital network (ISDN) : overall network aspects and functions, ISDN user-network interfaces: recommendations I.310 - I.470 / International Telecommunication Union Data Publicação: 1989 Tema: Vária
12.		Integrated services digital network (ISDN) : internetwork interfaces and maintenance principles: recommendations I.500 - I.605 / International Telecommunication Union Data Publicação: 1989 Tema: Vária