(3GdYQH hGdGSdGe aj GdMhV GdZQHj ef GdHMQ GdGHjV GdeJhSW ef aJM GdeZQH haJM GdGfOdS Gdi GNQ YUQ GdhdGI (B(138(3g(B-756(3e(B):s - (3aQhN ,YeQ s ((3HjQhJ(B:s (3OGQ GdcJGH GdYQHj ,s, 1981)
Keywords: (3GdYQH(B-(3JGQjN (B-(3GdYUQ GdGSdGej s