text Cibinong Pusat Survei Sumber Daya Alam Darat 2009 ind 106 hlm . ; ilus . ; 26 cm Sumatra Utara 978-979-26-6955-8 20150415140929.0 YOGYA-02110000003172 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)