HAERUDIN, N.; SUJONO, H. VALIDASI METODE KJELDAHL TANPA ASAM SALISILAT DALAM ANALISIS NITROGEN PADA PUPUK NPK PADAT BERBASIS UREA. Jurnal Kimia (Journal of Chemistry), [S. l.], v. 20, n. 1, p. 100–107, 2026. DOI: 10.24843/JCHEM.2026.v20.i01.p13. Disponível em: https://ejournal3.unud.ac.id/index.php/jchem/article/view/1032. Acesso em: 4 feb. 2026.