Penjumlahan 1-50 text Sidoarjo Butterfly 2010 cet. 1 ind 32 hlm. 28 cm. Sisilia N.S Matematika anak 513 513 SIS a 978-602-8786-18-8 INLIS000000000017333 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)