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Pellagra - A Medical Mystery - Extra History
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Defense of Poland - The Battle of the Border - Part 1 - Extra History
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The Deadliest Infectious Disease of All Time | Crash Course Lecture
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History of Coffee - Brewing Controversy - World History - Extra History - Part 1
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The Polio Epidemic - FDR & The March of Dimes - Medical History - Extra History
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The UnXplained: Shocking Ancient Mysteries Will Blow Your Mind!
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