NATURAL RADIATION SOURCES AND TRAGIC CONSEQUENCES OF RADIATION, EARTH RADIATION, TEACHING A PRACTICAL LESSON ON THE TOPIC OF RADIOBIOLOGICAL PROCESSES USING THE "CLUSTER" METHOD. Amer. Jour. of Peda. and Educ. Rese. 2023;9:100-106. Accessed January 1, 2026. https://americanjournal.org/index.php/ajper/article/view/437