(3aj GdeTeT (B/ s - (3bGHjd, eMeO eGgQs ((3GdbGgQI (B:s (3OGQ GdacQ GdYQHj,s, 1991)
Keywords: (3GdbUU GdYQHjIs; (3GdCeKGds; (3fGJTFhf UZGQ (B(10-14)(3SfIs