Husnizar, H., Wilopo, W., & Yuliansyah, A. T. (2018). The prediction of heavy metals lead (Pb) and zinc (Zn) contents in soil using NIRs technology and PLSR regression method. Journal of Degraded and Mining Lands Management, 5(3), 1153–1159. https://doi.org/10.15243/jdmlm.2018.053.1153