Berapakah Berat Bumi? / editor, Ervina, Yudha Kusuma; penerjemah, Ervina, Yudha Kusuma text Bandung Pakar Raya 2003 Cetakan : 1 ind xiii, 158 hlm. ;21 cm. Ilmu-Ilmu Sosial 300 978-076-456-519-9 20130516060440 INLIS000000000020106 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)