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Page 5523, results 138051 - 138075

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Geology and ore deposits of the Rico District, Colorado
Edwin Thor McKnight
1974, Professional Paper 723
The Rico district is in the Dolores River valley at the east end of Dolores County in southwestern Colorado. Mining has been actively carried on in the district since 1879. In the early days, silver was the chief product and was mined largely from Newman Hill southeast of the town...
Summary appraisals of the nation's ground-water resources – Ohio region
Richard M. Bloyd Jr.
1974, Professional Paper 813-A
Ground water in the Ohio Region is a large, important, and manageable resource that should have a significant role in regional water development. On the basis of a comparison of ground-water withdrawals with estimated ground-water recharge, it appears that the ground-water resources of the Ohio Region probably will not be used...