GOENADI, Didiek Hadjar. The Potential Use of Humic Acids. Jurnal Ilmu Tanah dan Lingkungan, [S. l.], v. 2, n. 2, p. 23–31, 2001. DOI: 10.29244/jitl.2.2.23-31. Disponível em: https://journal.ipb.ac.id/jtanah/article/view/2304. Acesso em: 31 mar. 2026.