Cita APA

(1997). United Nations International classification for reserves/resources: Solid fuels and mineral commodities : final version. Geneva: United Nations.

Citación estilo Chicago

United Nations International Classification for Reserves/resources: Solid Fuels and Mineral Commodities : Final Version. Geneva: United Nations, 1997.

Cita MLA

United Nations International Classification for Reserves/resources: Solid Fuels and Mineral Commodities : Final Version. Geneva: United Nations, 1997.

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