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	1.	Quality of the surface waters of Washington / by Walton Van Winkle. by Van Winkle, Walton, 1882-1941 Washington (State). State Board of Health Series: Geological Survey water-supply paper ; 339 Material type: Text; Format: print available online ; Literary form: Not fiction Publication details: Washington : Govt. Print. Off., 1914 Online resources: Click here to access online Availability: No items available. Add to cart (remove)
	2.	Quality of the surface waters of Oregon / by Walton Van Winkle ; prepared in cooperation with the State of Oregon, John H. Lewis, State Engineer. by Van Winkle, Walton, 1910- Oregon. State Engineer Series: Geological Survey water-supply paper ; 363 Material type: Text; Format: print available online ; Literary form: Not fiction Publication details: Washington : Govt. Print. Off., 1914 Online resources: Click here to access online Availability: No items available. Add to cart (remove)

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