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	1.	Preliminary report on the clays and shales of Minnesota, by Frank F. Grout and E.K. Soper. by Grout, Frank F. (Frank Fitch), 1880- Soper, Edgar Kirke, 1886- [joint author.] Geological Survey (U.S.) University of Minnesota Series: Minnesota. Geological survey. Bulletin 11 Material type: Text; Format: print ; Literary form: Not fiction Publication details: Minneapolis, The University of Minnesota, 1914 Availability: No items available. Add to cart (remove)
	2.	The peat deposits of Minnesota, by E. K. Soper. by Soper, Edgar Kirke, 1886- Geological Survey (U.S.) United States. Bureau of Mines Series: Bulletin (Minnesota Geological Survey) ; no. 16. Material type: Text; Format: print ; Literary form: Not fiction Publication details: Minneapolis, The University of Minnesota, 1919 Dissertation note: Published also as thesis (Ph. D.) University of Minnesota, 1917, with title: The origin, occurrence, and uses of Minnesota peat. Availability: No items available. Add to cart (remove)

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