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TOURISTS MUST BE GUIDED THROUGH FIERY FURNACE AN INTRICATE MAZE OF NARROW CANYONS. RANGER NATURALISTS LEADS... NARA .tif Scope and content General notes Local identifier DA Environmental Protection Agency NARAAuthor Hiser David Photographer File TOURISTSMUSTBEGUIDEDTHROUGHFIERYFURNACE ANINTRICATEMAZEOFNARROWCANYONS ARANGERNATURALISTSLEADS