“Geochemical Analysis of Soil and Kalipait River Water As Indicators of Environmental Degradation at the Central Point of the Ijen Geopark Area”. Integrative Perspectives of Social and Science Journal 3, no. 01 Januari (January 22, 2026): 412–417. Accessed October 22, 2026. https://ipssj.com/index.php/ojs/article/view/1148.