Yuarsah, I., E. P. Handayani, . Rakhmiati, and . Yatmin. “Restoration of Soil Physical and Chemical Properties of Abandoned Tin- Mining in Bangka Belitung Islands”. JOURNAL OF TROPICAL SOILS, vol. 22, no. 1, Jan. 2017, pp. 21-28, doi:10.5400/jts.2017.v22i1.21-28.