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	1.	Some anticlines of Routt county, Colorado, by R. D. Crawford, K. M. Willson and V. C. Perini. by Colorado Geological Survey Crawford, R. D. (Ralph Dixon), 1873- Willson, K. M Perini, Vincent Charles Series: Colorado. Geological survey. Bulletin 23 Material type: Text; Format: print ; Literary form: Not fiction Publication details: Denver, Col., Eames bros., state printers, 1920 Availability: No items available. Add to cart (remove)
	2.	Some anticlines of western Colorado, by R. C. Coffin, V.C. Perini, jr., and M. J. Collins. by Colorado Geological Survey Coffin, R. C. (Reuben Clare), 1886-1972 Perini, Vincent Charles Collins, M. J Material type: Text; Format: print ; Literary form: Not fiction Publication details: Denver, Col., Eames brothers, state printers, 1920 Availability: No items available. Add to cart (remove)

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