00713nam a2200217 c 4500001001300000005001500013007000300028008004100031049001800072052001700090056001400107082001200121245008900133260003300222300004200255650004700297650004700344710006000391910003000451950001400481KMO20207002520210126161318ta200918s1991    ulkad         000   korNA0 lEM7708359fGP01a326.41b20-2  a326.412601a38422320a(1991年度) 電氣通信에 關한 年次報告書 /d遞信部 通信政策局 編  a[서울] :b遞信部,c1991  axv, 358 p. :b삽화, 도표 ;c22 cm 8a전기 통신[電氣通信]0KSH1998020700 8a통신 정책[通信政策]0KSH2002031546  a한국.b체신부.b통신정책국0KAB2020064714aut 0a체신부 통신정책국1 a비매품