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Description: One piece of obsidian, possibly used as trephining instrument by Dr. T. Wilson Parry, in experiments on neolithic trephination, England, 1918-1920 License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: trephine Temporal: 1918-1920 Source: Science Museum Identifier: A652069/3 Go to resource More Like this...
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