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	1.	Barite in the Tennessee valley region / by W. J. Penhallegon, associate mining engineer, under the general direction of Edwin C. Eckel, chief geologist. by Penhallegon, William James, 1875- Eckel, Edwin C. (Edwin Clarence), 1875-1941 Series: Tennessee valley authority. Water control planning department. Geologic division. Geologic bulletin ; no. 9 Material type: Text; Format: print ; Literary form: Not fiction Publication details: Knoxville, Tenn., 1938 Availability: No items available. Add to cart (remove)
	2.	Building sandstones of northern Alabama, by W. J. Penhallegon. by Penhallegon, William James, 1875- Tennessee Valley Authority Series: Geological Survey of Alabama. Circular ; 13. Material type: Text; Format: print ; Literary form: Not fiction Publication details: University, Ala., 1940 Availability: No items available. Add to cart (remove)

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