(3GdeONd Gdi Yde GdGfSGf(B/s - (3YHO GdQRGb, SYOj ajVjs ((3GdYQGb, HZOGO(B:s (3efThQGJ HjJ GdMceI,s, 1989)
Keywords: (3GdGfKQhHhdhLjG GdGLJeGYjIs