(3GdceHjhJQ h GSGSjGJ Yde GdMGSH (B/s - (3NTHI(B: (3eMeO GdSYjO(B.s ([(3O(B. (3e(B. :s (3O(B. (3f(B. :s, 1990)
Keywords: (3GdMGSHGJ GdGdcJQhfjI(B.s