Não informado. (2001). Annual report on the mineral resources of the URSS. Geological Committee.
Cita Chicago Style (17a ed.)Não informado. Annual Report on the Mineral Resources of the URSS. Leningrad, Rússia: Geological Committee, 2001.
Cita MLA (8a ed.)Não informado. Annual Report on the Mineral Resources of the URSS. Geological Committee, 2001.
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