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Breadth/length (B/L) proportions in Acheulean bifaces: elongate examples seen in relation to the scatter plot of all finds from Kilombe (scales in mm). Outlines show the most elongated biface from Kilombe (B/L 0.41) and (right) the outline of the grand biface from Arago in SW France, 33 cm long (B/L 0.42) [108].
