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	1.	The fire clays of Maryland, by Arthur S. Watts, H. G. Schurecht, Charles K. Swartz and George M. Hall. With an introductory chapter by Edward B. Mathews. by Watts, Arthur Simeon, 1876- Schurecht, Harry George, 1892- Swartz, Charles Kephart, 1861- Hall, George Martin, 1891- Mathews, Edward Bennett, 1869- Series: Maryland. Geological survey, 1896- Special publications ; Vol. XI, pt. 2 Material type: Text; Format: print ; Literary form: Not fiction Publication details: Baltimore, The Johns Hopkins press, 1922 Availability: No items available. Add to cart (remove)
	2.	Ground water in Yellowstone and Teasure counties, Montana / by George M. Hall and C. S. Howard. by Hall, George Martin, 1891-1941 Howard, C. S. (Charles Spaulding), 1896- Series: U. S. Geological Survey water-supply paper ; 599 Material type: Text; Format: print ; Literary form: Not fiction Publication details: Washington : Govt. print. off., 1929 Availability: No items available. Add to cart (remove)

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