| Abstract: |
English summary on page 17 as follows: Prior to Bacsonian culturem the cleavers manufactured from pebbles of Sonvian culture had been treated as hand-picks (no data is available about those before Son Vi). The possibility of the exsitence of Sonvian picks with attached handles is not ruled out. Till Hoabinhian culture, Sonvian picks were replaced by curved-edge hoes. The technique of making edge went along with the improvement of pebble shape to suit the requirement. Such improvement had been apparaent, suggesting the presence of handles attaced to the picks. Bacsonian pick-axes (which were put earlier in the « Bacsonian polished axes » were quite big, large and thick tools (the length is 2,3 times more than the width), having distinct curved side and back, big curved edge, V-shaped verticla section, the scarls in line with the axis of the tools, with morphous knots. It is more reasonable to presume that Bacsonian axes suited the primitive Bacsonian agriculture.
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