NoorhidayahR., Musthafa M. B. and Sisno (2021) “Fourier Transform Infrared (FTIR) Spectroscopy of Humic Acid from Chicken Manure Compost with Different Biodecomposers: Spectroskopi Fourier Transform Infrared (FTIR) Asam Humat dari Kompos Kotoran Ayam dengan Biodekomposer Berbeda”, Jurnal Ilmu Tanah dan Lingkungan, 23(1), pp. 38-43. doi: 10.29244/jitl.23.1.38-43.