(3GdbGfhf Qbe (B118 (3dSfI (B1975 (3aj TCf GdGSJjQGO hGdJUOjQ (B/s - (3eUQ(B.s ((3GdbGgQI (B:s (3GdgjFI GdYGeI dTFhf GdeWGHY GdCejQjI,s, 1987)
Keywords: (3JTQjYGJ hbhGfjfs; (3GdGSJjQGO hGdJUOjQ(B.s