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	1.	Ground water resources of the Sioux Falls area, South Dakota. Geology, by E. P. Rothrock; Hydrology by E. G. Otton. by South Dakota Geological Survey Rothrock, E. P. (Edgar Paul), 1889-1977 Otton, E. G. (Edmond George), 1918- Geological Survey (U.S.) Series: Report of investigations (South Dakota Geological Survey) ; no. 56. Material type: Text; Format: print ; Literary form: Not fiction Publication details: Vermillion, University of South Dakota, 1947 Availability: No items available. Add to cart (remove)
	2.	Geology and ground-water resources of the London area, Kentucky, by E.G. Otton. Prepared in cooperation with the Geological Survey, U.S. Department of the Interior. by Kentucky. Division of Geology Otton, E. G. (Edmond George), 1918- Material type: Text; Format: print ; Literary form: Not fiction Publication details: [Lexington?] 1948 Availability: No items available. Add to cart (remove)

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