Items where Subject is "600 Technology/Teknologi > 620 Engineering and Applied Operations/Ilmu Teknik dan operasi Terapan > 628 Sanitary Engineering and Environmental Protection Engineering/Rekayasa Sanitasi dan Teknik Perlindungan Lingkungan, Teknik Lingkungan > 628.3 Sewage Treatment and Disposal/Pengolahan dan Pengaturan Kotoran"