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The Organization of Chipped-Stone Economies at Piedras Negras ...

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Figure 6.12: Third-series blades th<strong>at</strong> fe<strong>at</strong>ure pl<strong>at</strong>form planes, which are not perpendicular<br />

to the pressure scars on the dorsal surface <strong>of</strong> the blades. Drawings by Shuji Araki.<br />

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