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  2. Pre-Columbian era - Wikipedia


    The Pre-Columbian era incorporates all period subdivisions in the history and prehistory of the Americas before the appearance of significant European influences on ...

  3. pre-Columbian civilizations | Britannica.com


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    22.03.2012 · Video embedded · The Silk Road and Ancient Trade: In which John Green teaches you about the so-called Silk Road, a network of trade routes where goods such as ivory, silver

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  11. Resolve a DOI Name


    Type or paste a DOI name into the text box. Click Go. Your browser will take you to a Web page (URL) associated with that DOI name. Send questions or comments to doi ...