text Jakarta Perusahaan Umum Telekomunikasi 1985 I 20 hlm. 21 cm telekomunikasi 621.38 621.38 Per p INLIS000000000008149 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)