| REFINE  Browse All : Geologic Atlas and Text Page by McKinney, R.C.
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       Author Spurr, Josiah Edward Full Title (Legend to) Department Of The Interior, United States Geological Survey, Charles D. Walcott, Director. Atlas To Accompany Monograph XXXI On The Geology Of The Aspen District Colorado By Josiah Edward Spurr, Samuel Franklin Emmons, Geologist In Charge. Washington 1898. Julius Bien & Co. Lith. N.Y. Publisher United States Geological Survey 
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