“ANALISA PH, Fe, Mn PADA SUMBER AIR PANTI ASUHAN AISYIYAH KOTO TANGAH”. JURNAL KATALISATOR 7, no. 1 (April 28, 2022): 29–40. Accessed July 15, 2026. https://publikasi.lldikti10.id/index.php/katalisator/article/view/909.