text jakarta widjaya 1977 34 hlm. ilus. 21 cm. hidayat, bambang Planet bumi 523.3 k 523.3 hid P YOPDYOG 20170116103256.0 YOGYA000000000031289 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)