OECD bundled communication price baskets [documento eletrónico] / Organisation for Economic co-Operation and Development
Annual report & accounts 2020-2021 [documento eletrónico] : making communications work for everyone / Office of Communications
Telecom security incidents 2020 [documento eletrónico] : annual report / Vassiliki Gogou and Marnix Dekker
Communications market Report 2021 [documento eletrónico] : making communications work for everyone / Office of Communications
Informe de géstion consolidado 2020 [documento eletrónico] / Telefónica