na YOGYA-02130000001185 20130227102331.0 ind 010-021300000001185 628.53 SK 628.53 Ges U GESANG NUGROHO Uji kadar Co,Hc gas buang bus (Co,Hc concentration test on the emossion the buses) oleh gesang nugroho Yogyakarta: UGM, 1999 V, 27(1)lbr.: . Ilus.; 29 cm Bibliografi : lbr. 28 Udara - pencemaran 44458-PD/A.12