(3GdadSWjfjhf ai GdhWf GdYQHi (B: s (3OQGSGJ ai GhVGYge GdOjhZQGajI h GdGLJeGYjI h GdGbJUGOjI h GdSjGSjI (B/s - (3eYgO GdHMhK h GdOQGSGJ GdYQHjIs (b, 1978)
. 740-721 (3HHdjhLQGajG(B: (3UaMGJ(B.s
(3GdfU HGddZI GdYQHjIs
Keywords: (3GdefGWb ZjQ GdeSJbdIs -- (3adSWjfs; (3GdbGfhf GdOhdj GdYGes