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Questions before ordering? Use this form to request more information from The Book Firm About United States Geological Survey No. 291 to 297. A Gazzetteer of Colorado; The Bryozoan Fauna of the Rochester Shale; Reconaissance of Some Gold and Tin Deposits of the Southern Appalachians; Zinc and Lead Deposits of the Upper Mississippi Valley; The Yukon-Tanana Region, Alaska: Description of Circle Quadrangle; Economic Geology of the Independence Quadrangle, Kansas; The Yampa Coal Field, Routt County, Colorado, With a Chapter on the Character and Use of the Yampa Coals.