text Medan BPTP Sumatera Utara 2001 iv, 223p; ill; 30 cm AGRICULTURE TECHNOLOGY NORTH SUMATRA 631.17 631.17 979-3137-00-2 INLIS000000000003827 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)