text Jakarta Sinar Harapan 1982 Cet. 1 ind 116 hlm ilus 21 cm Mark Elder Keamanan air 615.853 20090227023940.0 YOGYA-02090000025438 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)