na INLIS000000000045599 20150205133802.0 978-979-18113-1-6 010-021500000000159 NBPDMAT 551.21 551.21 Pur a Purwanto Awas gunung api / Purwanto Cet. 2 Jakarta : Lazuardi Buku Utama, 2010 vi, 38 hlm. : ilis. ; 24 cm. Gunung Berapi