Darmono H, Koesmarijanto K, Suharto N. Indikator konsentrasi pelarut tembaga berbasis IOT . eltek [Internet]. 2022 Oct. 28 [cited 2024 Nov. 25];20(2):70-8. Available from: http://jurnal.polinema.ac.id/index.php/eltek/article/view/3096