text Yogyakarta BPFE 1990 Ed. 1 x, 174 p. ; 23 cm. Soeharto Prawirokusumo AGRICULTURE FARMING SYSTEMS PERTANIAN USAHATANI 631 PRA i INLIS000000000002809 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)