N. Mekonnen, K., A. Ambushe, A., S. Chandravanshi, B., R. Abshiro, M., du Plessis, A., & I. McCrindle, R. (2012). Assessment of the concentration of Cr, Mn and Fe in sediment using laser-induced breakdown spectroscopy. Bulletin of the Chemical Society of Ethiopia, 27(1), 1–13. https://doi.org/10.4314/bcse.v27i1.1