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WWI Bob: Yellowstone River
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WWI Bob: Firehole River Gorge
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WWI Bob: It's a Rainy Day
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WWI Bob: Bison on the Move
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WWI Bob: Lower Falls of the Yellowstone River
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WWI Bob: Top of Lower Falls on the Yellowstone River
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WWI Bob: Upper Falls of the Yellowstone River
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WWI Bob: Gibbon River Rapids
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WWI Bob: Gibbon River Rapids [Detail]