(3Hfh ESQGFjd ai GdbQBf hGdSfI (B:s (3GdLRA GdChd (B/s - (3eMeO SjO WfWGhis ([(3ecGf GdfTQ ZjQ eMOO(B] :s [(3GdfGTQ ZjQ eMOO(B](3,s, 1968)
(3GdfU HGddZI GdYQHjIs
Keywords: (3GdbQBf GdcQje hGdYdhe GdbQBfjIs; (3GdTQjYI GdESdGejIs