laporan Fakultas Geografi Universitas Gadjah Mada text Yogyakarta UGM 1980 vi, 42 p. : ill ; 30 cm SEDIMEN KUALITAS AIR KALI JRAGUNG 551.3.051 551.3.051 INLIS000000000005566 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)