RESEARCH INSTITUTE OF THE SUMATRA PLANTERS ASSOCIATION text Medan Avros s.a ind 13 p., ill.; 20 cm Research Institute of The Sumatra Planters Association SOIL SAMPLE RESEARCH NONE 220701 20220701091500 INLIS000000000003010 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)