Menyelamatkan planet bumi text Jakarta Yayasan Obor Indonesia 1994 Ed. 1, cet. 1 ind xviii, 231 hlm. : ilus. ; 21 cm. Ekonomi - Keadaan 330.9 979-461-166-2 YOPDYOG 20150701142354.0 YOGYA-02110000004847 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)