00576nam a2200193 c 4500001001300000005001500013007000300028008004100031049002800072052001600100056001300116082001400129245006000143260003100203300003800234650004600272700005300318950001100371KMO20150444320171201115739ta150204s2015    ulkad         000   kor  0 lEM6069933lEM6069934c201a004.5b15-3  a004.52601a004.622300a데이터 통신 =xData communication /d김옥환 저  a서울 :b良書閣,c2015  a312 p. :b삽화, 도표 ;c26 cm 8a데이터 통신[--通信]0KSH19980007151 a김옥환,g金玉煥,d1958-0KAC2017668904aut0 b\18000