(3ehShYI eQJHGJ hJQbjGJ hYdGhGJ GdYGedjf HGdbWGY GdYGe GdUGOQ HbGfhf Qbe (B48 (3dSfI (B1987 /s - (3eUQ(B.s ((3GdbGgQI (B:s (3GdgjFI GdYGeI dTFhf GdeWGHY GdCejQjI,s, 1988)
Keywords: (3JTQjYGJ hbhGfjfs; (3eQJHGJ hJQbjGJ(B.s