Home › Authors › Perry H. Rahn 👤 Perry H. Rahn b. 1936 ยท 3 books Books by Perry H. Rahn Potential of coal strip-mine spoils as aquifers in the Powder River Basin 1976 Large springs in the Black Hil Large springs in the Black Hills, South Dakota and Wyoming 1973 The surficial geology of the S The surficial geology of the Spring Hill quadrangle 1971
