(3GUhd Yde GdGbJUGO (B/ s - (3eMeO Ndjd HQYi(B.s; (3YHOGdgGOi YHOGdbGOQ Shjai(B.s ((3GdbGgQI (B: s (3OGQ GdKbGaI GdYQHjI (B,s, 1987)
(3GdfU HGddZI GdYQHjIs
Keywords: (3GdGbJUGOs