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Metallstatistik
(2020)
The Paradox of a metal standard : a case history of silver
Murad, Anatol, (1939)
Economic relations of silver to other metals in argentiferous ores
Merrill, Charles White, (1930)
Some thoughts on risk management for commodity portfolios
Christian, Jeffrey M., (2008)
Commodities rising : the reality behind the hype and how to really profit in the commodities market
Christian, Jeffrey M., (2006)