(3BaGb GdWH GdMOjK(B/s - (3QJSJGjf, OGajO O(B.s; (3GdGcMd, eMehOs ((3HjQhJ(B[(3dHfGf(B]:s (3OGQ GdGaGb GdLOjOI,s, 1967)
Keywords: (3GdWHs; (3GdQYGjI GdUMjIs