na YOGYA-02090000030250 20090227024448.0 ind 010-020900000030250 001.6424 001.6424 Yus P T YUSUF, Santoso Program pembasmi virus TNT virus Santoso Yusuf Jakarta Dinastindo [1990] 20 hlm ilus 21 cm Virus (Program Komputer) YOPDYOG(B) 1 95P0070477