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	1.	The conservation of artesian water, by Howard E. Simpson. by Simpson, Howard E. (Howard Edwin), 1874-1938 Material type: Text; Format: print ; Literary form: Not fiction Publication details: Grand Forks, N. Dak., 1926 Availability: No items available. Add to cart (remove)
	2.	A method of water prospecting, by Howard E. Simpson. by Simpson, Howard E. (Howard Edwin), 1874-1938 Series: North Dakota. Geological Survey. Bulletin 6 Material type: Text; Format: print ; Literary form: Not fiction Publication details: Grand Forks, N. Dak., 1927 Availability: No items available. Add to cart (remove)
	3.	Geology and ground-water resources of North Dakota, by Howard E. Simpson. With a discussion of the chemical character of the water, by Harry B. Riffenburg. Prepared in cooperation with the State geological survey of North Dakota. A. G. Leonard, director. by Simpson, Howard E. (Howard Edwin), 1874-1938 Riffenburg, Harry Buchholz, 1891- North Dakota Geological Survey Series: Water-supply paper (Washington, D.C.) ; 598. Material type: Text; Format: print ; Literary form: Not fiction Publication details: Washington, U.S. Govt. print. off., 1929 Availability: No items available. Add to cart (remove)
	4.	Methods of reducing the flow of artesian wells, by Howard E. Simpson. by Simpson, Howard E. (Howard Edwin), 1874-1938 Edition: Revised edition. Material type: Text; Format: print ; Literary form: Not fiction Publication details: Grand Forks, N. Dak., 1932 Availability: No items available. Add to cart (remove)
	5.	The ground waters of North Dakota, by Howard E. Simpson. by Simpson, Howard E. (Howard Edwin), 1874-1938 Series: North Dakota. Geological Survey. Bulletin 7 Material type: Text; Format: print ; Literary form: Not fiction Publication details: Grand Forks, N. Dak., 1932 Availability: No items available. Add to cart (remove)
	6.	The artesian waters of North Dakota, by Howard E. Simpson. Including also: The Fifth biennial report of the State water geologist, The Sixth biennial report of the State water geologist. by Simpson, Howard E. (Howard Edwin), 1874-1938 Series: Artesian water conservation fund, Artesian water paper ; no. 6 Material type: Text; Format: print ; Literary form: Not fiction Publication details: Grand Forks, N. Dak., 1935 Availability: No items available. Add to cart (remove)
	7.	Change in ground water levels in North Dakota, by Howard E. Simpson; a report based upon data collected for the Mississippi Valley Committee, P. W. A., 1934. by Simpson, Howard E. (Howard Edwin), 1874-1938 Material type: Text; Format: print ; Literary form: Not fiction Publication details: Grand Forks, N. Dak., 1937 Availability: No items available. Add to cart (remove)

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