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Rahn, P.H. 1976. Potential of Coal Strip Mine Spoils as Aquifers in the Powder River <br />Basin: Project No. 10470025, Old West Regional Commission, Billings, MT. 108 p. <br />VanVoast, W.A. and R.B. Hedges. 1975. Hydrogeologic Aspects of Existing and Proposed <br />Strip Coal Mines Near Decker, Southeastern Montana. Montana Bureau of Mines and <br />Geology Bulletin 97. 31 p. <br />•, <br />r--7 <br />21