Standardization of Ayurvedic Drug- Nyctanthes Arbor-Tristis, Hippophae Salicifolia, Ocimum Tenuiflorum and Reinwardtia Indica and Combined Herb-Herb. Nepal J Biotechnol 2020, 8 (1), 36-53. https://doi.org/10.3126/njb.v8i1.30208.