D'Ambrosio, Mary. "The Myth of an Empty Frontier: Explorers’ Diseases Wiped out Native Populations Long before Settlers Arrived.” Review. San Francisco Chronicle, August 14, 2005.
San Francisco Chronicle
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D'Ambrosio, Mary. "The Myth of an Empty Frontier: Explorers’ Diseases Wiped out Native Populations Long before Settlers Arrived.” Review. San Francisco Chronicle, August 14, 2005.