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3Norman Miskelly. Progress on International Standards for Reporting of Mineral Resources and Reserves~J~. NM Reston Paper, 2003.
4Joint Ore Reserves Committee of the Australasian Institute of Mining and Metallurgy, Australian Institute of Geoscientists and Minerals Council of Australia (JORC). Australasian Code for Reporting o{ Mineral Resources and Ore Reserves (the JORC Code)IS]. 1999. Australia.