Informe de géstion consolidado 2022 [documento eletrónico] / Telefónica
Marketscope for telecom expense management / Eric Goodness...[et al.]
Modernisation and privatisation of postal systems in Europe : new opportunities in the area of financial services / Roberto Ruozi, Luisa Anderloni
The telecoms finance databook : performance of key companies / Michael Denmead and Elizabeth Potter
The telecoms finance databook : performance of key companies / Michael Denmead and Andrea Smith