text Jakarta Yayasan Obor Indonesia 1990 xvi, 269 p. : ill ; 21 cm EKOLOGI 577.4 577.4 979-461-052-6 INLIS000000000000303 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)