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1.
Relations among water levels, specific conductance, and depths of bedrock fractures in four ... by Charles W. Schalk, Nicholas... ISBN: 9781288850747 List Price: $17.75
2.
Relations Among Water Levels, Specific Conductance, and Depths of Bedrock Fractures in Four ... by Charles W Schalk, Nicholas ... ISBN: 9781500163754 List Price: $17.99