Cellan-Jones, Rory Always On : Hope and Fear in the Social Smartphone Era / Rory Cellan-Jones. - 295 pages ; 22 cm ISBN: 9781472981196 9781472992277 9781472981172 9781472981189 Subjects--Topical Terms: Soziokultureller WandelKommunikationsverhalten Dewey Class. No.: 303.48/33 / C393