text Jakarta Gramedia 1981 30 hlm. ilus. 21 cm. Katak 597 K 597 Kat YOPDYOG 20170118145149.0 YOGYA000000000006556 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)