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Hyŏngsa chŏngch'aekchŏk kwanchŏm esŏ pon sŭmat'ŭ midiŏ chŏngch'aek yŏn'gu
Mi-suk oe Pak · Han'guk Hyŏngsa Chŏngch'aek Yŏn'guwŏn
387 sayfa · 2014
Consumer protection / Law and legislation / Smartphones / Social aspects / Mobile communication systems