Apa Pendapatmu ? Kenapa Benda Jatuh ? / editor, Margaretha Hutauruk, Eddy; penerjemah, Felicia Asrinanda, Badrus text Jakarta Erlangga for Kid 2008 Cetakan : 2 ind 24 hlm. : ilus. ;28 cm. Ilmu Murni 500 979-781-721-0 20130515142337 INLIS000000000004119 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)