Tioner Purba text Medan Yayasan Kita Menulis 2021 Cet. 1 id xiv, 109 p.: ill.; 21 Kesuburan Tanah 631.452 978-623-342-165-2 250804 20250804105023 INLIS000000000005549 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)