Uji kadar Co,Hc gas buang bus (Co,Hc concentration test on the emossion the buses) text Yogyakarta UGM 1999 ind V, 27(1)lbr.: . Ilus.; 29 cm oleh gesang nugroho Bibliografi : lbr. 28 Udara - pencemaran 628.53 20130227102331.0 YOGYA-02130000001185 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)