Nortojiyeva, D., Egamberdiev, E., Shomurodov, D. and Hamidullayeva, S. 2023. KOSMETIK VOSITALAR TARKIBIDAGI OG‘IR METALLAR MIQDORINI ANIQLASHNING ANALITIK USULLARI. Educational Research in Universal Sciences. 2, 14 SPECIAL (Nov. 2023), 616–619.