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	1.	Geology and petrology of the Ute Mountains area, Colorado, by E. B. Ekren and F. N. Houser. by Ekren, E. B. (Einar Bartlett), 1923- Houser, F. N. (Frederick Northrop), 1924- Material type: Text; Format: print ; Literary form: Not fiction Publication details: Washington, U.S. Govt. Print. Off., 1965 Availability: No items available. Add to cart (remove)
	2.	Geological-geophysical investigations of bedrock in the Island Fall quadrangle, Aroostook and Penobscot Counties, Maine, by E.B. Ekren and F.C. Frischknecht. by Ekren, E. B. (Einar Bartlett), 1923- Frischknecht, Frank C [joint author.] Series: Geological Survey professional paper ; 527 Material type: Text; Format: print ; Literary form: Not fiction Publication details: Washington, U.S. Govt. Print. Off., 1967 Availability: No items available. Add to cart (remove)

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