Salam, Abdul Kadir, and Kiat Ginanjar. 2018. “Tropical Soil Labile Fractions of Copper in the Experimental Plots ±Ten Years After Application of Copper-Containing-Waste”. JOURNAL OF TROPICAL SOILS 23 (1):11-18. https://doi.org/10.5400/jts.2018.v23i1.11-18.