Mine Sampling and Valuing; a Discussion of the Methods Used in Sampling and Valuing ore Deposits, With Especial Reference to the Work of Valuation by the Independent Engineer Chester Wells Purington C S Herzig Hardback. Legare Street Press 2022-10-27. ISBN 9781017443691
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Mine Sampling and Valuing; a Discussion of the Methods Used in Sampling and Valuing ore Deposits, With Especial Reference to the Work of Valuation by the Independent Engineer

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