MEZGA, K.; VRHOVNIK, P.; ŠOLAJA, D.; GULLÓN, L.; MAUKO PRANJIĆ, A.; GARCIA URIARTE, A. EXPLORE THE BRIEFCASE - LEARNING ABOUT RAW MATERIALS THROUGH NON-CONVENTIONAL TEACHING TOOLS. Geologica Macedonica, v. 33, n. 2, p. 159-166, 11 Dec. 2019.