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http://www.nps.gov/miss/features/mussels/index.html Stone tools from national park service of the united states, used with:

Public domain This image or media file contains material based on a work of a National Park Service employee, created during the course of the person's official duties. As a work of the U.S. federal government, such work is in the public domain. See the NPS website and NPS copyright policy for more information.


Originally uploaded to English Wikipedia by en:User:Ctrl build

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