Não informado. (1951). Annual Report of the International Tin Research Council. International Tin Research Institute.
Chicago-referens (17:e uppl.)Não informado. Annual Report of the International Tin Research Council. Greenford, Inglaterra: International Tin Research Institute, 1951.
MLA-referens (8:e uppl.)Não informado. Annual Report of the International Tin Research Council. International Tin Research Institute, 1951.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.