text Yogyakarta BPFE 1991 cet. 1 ind VI, 183 hlm. : ilus. ; 21 cm Penelitian 20161107110638.0 YOGYA-10100000001708 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)