text Yogyakarta Kanisius 1997 - ind 44 hlm.: ilus.; 19 cm.--(Teknologi Tepat Guna) Biogas 979-497-823-x 20110202090120425 YOGYA-02110000001714 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)