NjumeA. C., PurwantoY. A., AstutiD. A., & WidodoS. (2021). Rapid Assessment of Fresh Beef Spoilage Using Portable Near-Infrared Spectroscopy. Jurnal Keteknikan Pertanian, 9(3), 79-86. https://doi.org/10.19028/jtep.09.3.79-86