(3ePcQGJ gOi TYQGhi (B:s (3QGFOI GdeQCI GdYQHjI GdMOjKI (B/ s - (3gOi TYQGhis ((3GdbGgQI (B: s (3OGQ GdgdGd ddWHGYI hGdfTQ , s, 1981)
Keywords: (3GdJQGLe GdPGJjIs; (3gOi TYQGhis