text Jakarta Perusahaan Umum Telekomunikasi 1981 I iii, 36 hlm. 20 cm telekomunikasi 621.380 28 621.380 28 Moe p INLIS000000000007576 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)