The expanding digital universe [documento electrónico] : a forecast of worldwide information growth through 2010 / John F. Gantz...[et al.]
Report on telecoms price developments from 1998 to 2006 [documento electrónico] / prepared by Teligen
Rethinking universal service for a next generation network environment [documento electrónico] / Organisation for Economic co-Operation and Development
Estudo sobre comunicação e liderança / Grupo Inforpress