na INLIS000000000000188 ind 0010-0120000188 Science 1A for Junior High School Grade VII 1st Semester Sumarwan, Sumartini, Kusmayadi, Sitti Soetarmi (Editor) Jakarta : Erlangga, 2006 978-979-075-634-2 507 SUM s 507 Ilmu Pengetahuan Alam -- Studi dan Pengajaran 21900188