%0 Journal Article %T “Immature amber” — krantzite — in the Middle Urals %A Martirosyan, O.V. %K fossil resin, krantzite, Middle Urals %J Vestnik of geosciences %D 2022 %N 0 %P 5 %I FSBI FIC "Komi Scientific Center of the Ural Branch of the Russian Academy of Sciences"