A’yun Q, Hanik NR, Eskundari RD. Analysis of Hardness Level and pH of Drilled Well Water in Semin Village, Semin District, Gunungkidul Regency. JBT [Internet]. 2023 Jul. 3 [cited 2024 May 19];23(3):310-5. Available from: https://jurnalfkip.unram.ac.id/index.php/JBT/article/view/5086