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Hand axe - Wikipedia
Acheulean - Wikipedia
Caddo Biface - Museum of Stone Tools
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Bifaces: Stone Tools Worked on Both Sides - YouTube
Artifact of the Week: Biface – SAN DIEGO ARCHAEOLOGICAL …
Welcome to Biface.info, the use of hand-axes in prehistoric times
Handaxes and Biface Technology | SpringerLink
Biface, commonly referred to as a hand ax | Lower Paleolithic Period ...
Stage and continuum approaches in prehistoric biface production: …