text Medan Polbangtan Medan 2022 ind ii, 26 p. 30 cm Edika Putra Tarigan D 633.18-115 D 633.18-115 TAR i INLIS000000000000092 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)