(3fXQjI GdKbGaI (B/s - (3Ydj GdSjO, GdUGhjs; (3eLehYI ef GdeDdajf(B;(3GdaGQhbs ((3GdchjJ (B:s (3YGde GdeYQaI ,s, 1997)
Keywords: (3GdKbGaI GdSjGSjIs; (3GdKbGaIs