Lisan, Ahmad Rif'an Khoirul, et al. “ENHANCING THE SANDY SOIL STRUCTURE OF THE SAMAS COASTAL AREA USING ANAEROBIC DIGESTION SLUDGE DERIVED FROM PALM OIL MILL EFFLUENT”. Jurnal Tanah Dan Sumberdaya Lahan, vol. 12, no. 1, Jan. 2025, pp. 97-106, https://doi.org/10.21776/ub.jtsl.2025.012.1.10.