(3MjGJi (B((3SjQI GdeQMhe Ydi eHGQc HGTG(B) / s - (3YHOGdQMje jhSa GdLeds; (3Ydi HGTG eHGQcs ([S.N] : (3ecJHI GdGOGH , s, 1989)
Keywords: (3GdePcQGJs; (3GdJQGLe GdPGJjIs