Não informado. (1951). Annual Report of the International Tin Research Council. International Tin Research Institute.
Chicago-viite (17. p.)Não informado. Annual Report of the International Tin Research Council. Greenford, Inglaterra: International Tin Research Institute, 1951.
MLA-viite (8. p.)Não informado. Annual Report of the International Tin Research Council. International Tin Research Institute, 1951.
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