Nasution, Farizal text Medan Mitra 2012 Ed. Baru ind iv, 88 hal. : Ilus. ; 25 cm. Farizal Nasution Bibliografi hal. 86-87 EKOLOGI DANAU DANAU TOBA JUDUL 577.63 577.63 NAS e 978-602-245-065-8 230830 20230830113906 INLIS000000000013129 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)