text Jakarta Penebar Swadaya 1997 Cet. 2 ind 81 hlm ilus 21 cm Setiyo Pitoyo Bibliografi : hlm. 77-80 Pupuk Urea 631.84 979-489-301-3 20090227024856.0 YOGYA-02090000034268 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)