Bogoevski, Slobodan, Boško Boškovski, Gordana Ruseska, and Katerina Atkovska. “Concentration of Carbonate Admixture from Opalized Tuff into One Separate Fraction”. Geologica Macedonica 30, no. 1 (June 8, 2016): pp. 89-. Accessed December 20, 2024. https://js.ugd.edu.mk/index.php/GEOLMAC/article/view/1434.