A STUDY OF THE PRESENCE OF MICROFUNGI IN OLD AND RARE BOOK COLLECTIONS AND THEIR IMPACT. Proceedings of the YSU B: Chemical and Biological Sciences, [S. l.], v. 60, n. 1 (268), p. 23–32, 2026. DOI: 10.46991/PYSUB.2026.60.1.023. Disponível em: https://journals.ysu.am/proceedings-chem-biol/article/view/vol60_no1_2026_pp023-032. Acesso em: 7 apr. 2026.