Pratiwi Utami, Y. ., Imrawati, I. and Songga, E. . (2023) “Effects of Exposure Methods to Differences in Material Analysis of Plant Tanin in Leaves of Psidium guajava L. According to UV-Vis Spectroscopic photometry From Tana Toraja South Sulawesi”, Annals of Mechnikov’s Institute, (4), pp. 68–72. doi: 10.5281/zenodo.10255275.