(3GTcGdGJ GdJfajP ai GdehGO GdLfGFjI (B/ s - (3GMeO YHOGdXGgQ GdWjHs ([S.N] : (3dLfI GdGYdGe hGdOQGSGJ GdeSJbHdjI , s, 1989)
Keywords: (3GdbGfhf GdLfGFis; (3GdbGfhfs; (3bGfhf GdGLQGAGJ GdLfGFjIs