Books by E. D. Gardner — EbookNetworking.net

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Power-shovel and dragline placer mining
E. D. Gardner
13.29
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Placer mining in the western United States: part 1. general information, hand-shoveling, and ground-sluicing
E. D. Gardner
12.24
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Mining methods and costs at the Eureka Standard mine
E. D. Gardner
13.99
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