Não informado. (2001). Annual report on the mineral resources of the URSS. Geological Committee.
Chicago-Zitierstil (17. Ausg.)Não informado. Annual Report on the Mineral Resources of the URSS. Leningrad, Rússia: Geological Committee, 2001.
MLA-Zitierstil (8. Ausg.)Não informado. Annual Report on the Mineral Resources of the URSS. Geological Committee, 2001.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.