Membuat alat penjernih air Widarto text Yogyakarta Kanisius 2003 Cet. VIII ind
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40p. : ilus. ; 19cm L. Widarto di Rak Pengolahan, Mesin Widarto Alat penjernih air 621.8 621.8 WID m 979-497-306-8 230113 20230113011107 INLIS000000000003034 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)