(3ajNJ (B: s (3MjGJg (B- (3BKGQg eY YQV dadSaJg (B/ s - (3LhdjG, OjOjIs; (3feQ, MSjHs ((3HjQhJ (B:s (3GdeDSSI GdYQHjI ddOQGSGJ,s, 1980)
Keywords: (3GdadSaI GdCdeGfjIs; (3GdJQGLes