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1by Philbrick, Francis S. (Francis Samuel), 1876-1970“...United States Territorial expansion....”
Published 1965
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2by Hinsdale, B. A. (Burke Aaron), 1837-1900“...United States Territorial expansion....”
Published 1975
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4by Maulden, Kristopher, 1981-“...United States Territorial expansion. http://id.loc.gov/authorities/subjects/sh85140559...”
Published 2019
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