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TUFA CLIFF GRAND CANYON COLORADO RIVER NARA .tif Scope and content General notes Local identifier WA Smithsonian Institution NARAAuthor O'Sullivan Timothy Photographer File TUFACLIFF GRANDCANYON COLORADORIVERNARA tif tif File TUFACLIFF GRANDCANYON COLORADORIVERNARA NARAcooperation PDUSGov NARA TIF images with categorized