text Jakarta Erlangga 1990 Cet. 2 ind xi, [174] hlm ilus 23 cm T.S. Hutauruk Bibliografi : hlm. [170] Listrik 621.319 20090227022742.0 YOGYA-02090000017371 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)