United Nations Framework Classification for Fossil Energy and Mineral Reserves and Resources 2009 incorporating Specifications for its Application,
United Nations, 2013, X, 57 p..
.
United Nations Framework Classification for Fossil Energy and Mineral Reserves and Resources 2009 incorporating Specifications for its Application.
Geneva: United Nations, 2013, X, 57 p..
(2013)
United Nations Framework Classification for Fossil Energy and Mineral Reserves and Resources 2009 incorporating Specifications for its Application,
Geneva: United Nations, X, 57 p.
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