International mobile roaming strategic guidelines [documento eletrónico] / International Telecommunication Union
ICT prices 2017 [documento eletrónico] / International Telecommunication Union
Measuring digital development [documento eletrónico] : ICT price trends 2019 / International Telecommunication Union
Measuring digital development [documento eletrónico] : ICT price trends 2020 / International Telecommunication Union
Measuring digital development [documento eletrónico] : facts and figures; : focus on least developed countries / International Telecommunication Union