Сидорова, Л., Кацнельсон, Е. and Балаева-Тихомирова, О. (2021) “BIOCHEMICAL STUDIES ON THE NATURAL OBJECTS IN THE ORGANIZATION OF CHEMICAL EXPERIMENT AT SCHOOL”, SWorldJournal, 5(08-05), pp. 77–85. doi: 10.30888/2663-5712.2021-08-05-057.