DJUMA, AGUSTINA WILHELMINA, and FRENGKI OLLA. “THE EXAMINATION OF TOTAL HARDNESS ON DRINKING WATER WITH BOILING AND FILTER PROCESS USING COMPLEXOMETRY METHOD”. JURNAL INFO KESEHATAN 14, no. 1 (June 10, 2016): 1168–1177. Accessed November 22, 2024. https://jurnal.poltekkeskupang.ac.id/index.php/infokes/article/view/105.