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Simamora NN, Suparno S. Effect Mass of Silica Sand on Reducing Fe Concentration in Water Purification Systems . jppipa, pendidikan ipa, fisika, biologi, kimia [Internet]. 2023 Sep. 25 [cited 2024 Jul. 1];9(9):7527-32. Available from: https://jppipa.unram.ac.id/index.php/jppipa/article/view/3416