(3cja JYjT eY HSe Gddg GdQMef GdQMje(B.s - (3YHO GdebUhO , EHQGgje GdSjO s ([(3O(B. (3e(B]:s [(3O(B. (3f(B](3,s, 1997)
Keywords: (3GdhYX hGdEQTGOs