(3GdehLR aj GdbGfhf GdOhdj GdNGU(B:s (3OQGSI ebGQfI Hjf Gdabg GdOhdj h GdCfXeI GdSYhOjI(B/s - (3HOQ GdOjf YHOGdefYe Thbjs ((3ecGf GdfTQ ZjQ eMOO(B] :s [(3GdfGTQ ZjQ eMOO(B],s, 1979)
. (3jTJed Ydi EQLGYGJ HHjdhLQGajIs
(3GdfU HGddZI GdYQHjIs
Keywords: (3GdbGfhf GdOhdj GdNGU(B.s