Light microscope photography in a cold room laboratory of the Geography faculty of Lomonosov Moscow State UniversityD.M. Frolov, G.A. Rzhanitsyn, A.V. Koshurnikov and V.E. GagarinE3S Web Conf., 431 (2023) 03003DOI: https://doi.org/10.1051/e3sconf/202343103003