text Yogyakarta UGM 1990 vii, 41 p. : ill ; 30 cm SEDIMENTASI EROSI 631.45 631.45 INLIS000000000002651 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)