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       Author Spurr, Josiah Edward Full Title Hunter Park Special Sheet. Geology Sheet XVII . U. S. Geological Survey, Charles D. Walcott, Director. Monograph XXXI. A.H. Thompson, Geographer. F.M Douglas, Topographer in charge. Triangulation by E.M. Douglas. Topography by (R.C. McKinney). S.F. Emmons, Geologist in Charge. Geology by J.E. Spurr. Assistant, G.W. Tower. Surveyed in 1893. Julius Bien & Co. Lith. N.Y. (1898) Publisher United States Geological Survey 
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