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	1.	The coal resources of McCone County, Montana, by A. J. Collier and M. M. Knechtel. by Collier, Arthur J. (Arthur James), 1866-1939 Knechtel, Maxwell M. (Maxwell McMichael), 1897- [joint author.] Material type: Text; Format: print ; Literary form: Not fiction Publication details: Washington, U.S. Govt. Print. Off., 1939 Availability: No items available. Add to cart (remove)
	2.	Geology and mineral resources of Haskell County, Oklahoma, by Malcolm C. Oakes and M. M. Knechtel. by Oakes, Malcolm C. (Malcolm Christie), 1890-1977 Knechtel, Maxwell M. (Maxwell McMichael), 1897- Series: Bulletin (Oklahoma Geological Survey) ; 67. Material type: Text; Format: print ; Literary form: Not fiction Publication details: Norman, 1948 Availability: No items available. Add to cart (remove)
	3.	Geology and coal and natural gas resources of northern Le Flore County, Oklahoma. by Knechtel, Maxwell M. (Maxwell McMichael), 1897- Material type: Text; Format: print ; Literary form: Not fiction Publication details: Norman, 1949 Availability: No items available. Add to cart (remove)

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