(3cJGH GdJhGHjf (B/s - (3GHf bOGeI, YHO Gddg Hf CMeOs 541-620 (3gLQjs; (3TGgjf, eMeO YHO GdbGOQs ((3HjQhJ (B- (3dHfGf(B:s (3OGQ GdcJH GdYdejI,s, 1997)
Keywords: (3GdhYX hGdEQTGOs