Home › Authors › Chester Wells Purington 👤 Chester Wells Purington 2 books Books by Chester Wells Purington Mine Sampling and Valuing; a D 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 2018 Methods and Costs of Gravel an Methods and Costs of Gravel and Placer Mining in Alaska 1905