Institut geologii (Akademi︠i︡a nauk SSSR. Karelʹskiĭ filial), Sokolov, V. A., Kalinin, ︠. K., & D︠i︡ukkiev, E. F. (1984). Shungity--novoe uglerodistoe syrʹe. "Kareli︠i︡a".
Lua i Stíl Chicago (17ú heag.)Institut geologii (Akademi︠i︡a nauk SSSR. Karelʹskiĭ filial), Vladimir Alekseevich Sokolov, ︠I︡Uriĭ Klavdievich Kalinin, agus E. F. D︠i︡ukkiev. Shungity--novoe Uglerodistoe Syrʹe. Petrozavodsk: "Kareli︠i︡a", 1984.
Lua MLA (8ú heag.)Institut geologii (Akademi︠i︡a nauk SSSR. Karelʹskiĭ filial), et al. Shungity--novoe Uglerodistoe Syrʹe. "Kareli︠i︡a", 1984.
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