na JATIM-06090000031772 20090625114258.0 ind 979-731-482-0 0010-060900000031772 0 005.84 CHA v CHANDRALEKA, Happy 0 Virus, worm dan trojan horse Yogyakarta Andi 2004 xvi, 196 hlm. : ilus. ; 21 cm. 0 0 KOMPUTER, VIRUS JIPDSUR 4 0