(3GdhWf GdYQHj HYO GdMQH GdYGdejI GdKGfjI(B/s - (3GdjGS aQLs ((3HjQhJ(B[(3dHfGf(B]:s (3GdeDSSI GdYQHjI ddOQGSGJ hGdfTQ,s, 1981)
Keywords: (3GdeLJeY GdYQHjs; (3GdMQH GdYGdejI GdKGfjIs