(3GdbGfhf Qbe (B1 (3dSfI (B1990 (3HTCf GdLeYjGJ GdJYGhfjI GdJYdjejI hdGFMJg GdJfajPjI GdUGOQI HbQGQ hRjQ GdJYdje (B83 (3dSfI (B1990 /s - (3eUQ(B.s ((3GdbGgQI (B:s (3GdgjFI GdYGeI dTFhf GdeWGHY GdCejQjI,s, 1990)
Keywords: (3JTQjYGJ hbhGfjfs; (3GdLeYjGJ GdJYGhfjI(B.s