Institut geologii (Akademi︠i︡a nauk SSSR. Komi nauchnyĭ ︠t︡sentr), Vseso︠i︡uznoe mineralogicheskoe obshchestvo, ︠I︡Udovich, ︠. Ė., & Silaev, V. I. (1987). Geokhimi︠i︡a, mineralogi︠i︡a i litologi︠i︡a chernykh slan︠t︡sev: Sbornik nauchnykh trudov. Komi filial AN SSSR.
Chicago Style (17th ed.) CitationInstitut geologii (Akademi︠i︡a nauk SSSR. Komi nauchnyĭ ︠t︡sentr), Vseso︠i︡uznoe mineralogicheskoe obshchestvo, ︠I︡Akov Ėlʹevich ︠I︡Udovich, and V. I. Silaev. Geokhimi︠i︡a, Mineralogi︠i︡a I Litologi︠i︡a Chernykh Slan︠t︡sev: Sbornik Nauchnykh Trudov. Syktyvkar: Komi filial AN SSSR, 1987.
MLA (8th ed.) CitationInstitut geologii (Akademi︠i︡a nauk SSSR. Komi nauchnyĭ ︠t︡sentr), et al. Geokhimi︠i︡a, Mineralogi︠i︡a I Litologi︠i︡a Chernykh Slan︠t︡sev: Sbornik Nauchnykh Trudov. Komi filial AN SSSR, 1987.