F. Baehaki, Y. Wahyudin, R. Perdana, A. S. Nurfajar, and Z. I. Syaripudin, “Analysis of chromium(IV) levels in residents’ well water around the Citarum River, Indonesia: Bahasa Indonesia”, J. of Sustainability Sci. and Tech. , vol. 1, no. 1, pp. 13-22, Jun. 2021.