Soeratno text Jakarta Universitas Terbuka 1987 - 26 hlm. : ilus. ; 30 cm Soeratno Ekonomi-Pertanian 338.1 338.1 Soe m 20240829082353 INLIS000000000006147 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)