(3GdbGfhf Qbe (B143 (3dSfI (B1981 (3aj TCf GdCQGVj GdUMQGhjI hdGFMJI GdJfajPjI GdUGOQI HbQGQ hRjQ GdJYejQ hGdOhdI ddGScGf Qbe (B198 (3dSfI (B1982 (3hGdbGfhf Qbe (B7 (3dSfI (B1991 (3aj TCf HYV GdCMcGe GdeJYdbI HCedGc GdOhdI GdNGUI (B/s - (3eUQ(B.s ((3GdbGgQI (B:s (3GdgjFI GdYGeI dTFhf GdeWGHY GdCejQjI,s, 1994)
Keywords: (3JTQjYGJ hbhGfjfs; (3GdCedGc(B.s; (3GdCQGVj(B.s