The protection of telecommunication lines and equipment against lightning discharges / International Telecommunication Union
Handbook guide to the use of ITU-T publications produced by study group 5 aimed at achieving electromagnetic compatibility and safety / ITU
Minutes and reports of the plenary assembly : list of study groups and questions under study / International Telecommunication Union
Opinions and resolutions recommendations on the organization and working procedures of CCITT (series A) / International Telecommunication Union