na YOGYA-02090000026517 20090227024049.0 ind 010-020900000026517 613.69 613.69 Eld K ELDER, Mark Keamanan di air Mark Elder Cet. 1 Jakarta Sinar Harapan 1982 116 hlm ilus 21 cm Keselamatan YOPDYOG(B) 27-1-2007 3 06A0015232 06A0015233 06A0015234