Silaen, M., Noor, E. and Rahayuningsih, M. 2023. Improvement of purification process of stevia extract by combination of microfiltration and ultrafiltration. Menara Perkebunan. 91, 1 (Apr. 2023). DOI:https://doi.org/10.22302/iribb.jur.mp.v91i1.521.