na INLIS000000000003734 20171019023549 0010-1017000570 ta 171019 0 ind 978-979-015-284-7 551.554 551.554 WIL a Williams, Brian Ada Apa Di bumi? Petir / Brian Williams Cet. 1 Jakarta : Erlangga, 2007 32hlm : ilus ; 22 cm Petir Indeks,32 1491/PERPUSHST/2009 1491/PERPUSHST/2010 1491/PERPUSHST/2010