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Maji, Dwi Fuad and Kurniati, Dwi (2021) PENGARUH SUBSTITUSI LIMBAH ABU SEKAM PADI TERHADAP BATA BETON DENGAN PERSENTASE 3,5%, 7% DAN 10,5% THE EFFECT OF SUBSTITUTION OF RICE HUSK ASH WASTE ON CONCRETE BRICK WITH A PERCENTAGE OF 3.5%, 7% AND 10.5%. Tugas Akhir thesis, University Technology Yogyakarta.