(3GdejKGb GdEfSGfj hGdeYGjjQ GdOfjG dehGLgI GdchGQK (B:s (3eTQhY CSajQ (B/s ((3YeGf, GdCQOf (B:s (3OGQ GdTQhb,s, 2000)
(3cTGaGJ (B: (3U(B. 352-363.s
Keywords: (3GdchGQKs -- (3EOGQIs; (3GdNOeI GdGLJeGYjIs