(3TQM bGfhf GdGLQGAGJ GdLfGFjI(B. s (3GdLRA GdGhd, s (3GdOYhi GdLfGFjI, GdOYhi GdeOfjI, GdfjGHI GdYGeI, GdVHW GdbVGFj, bGVj GdJMbjb, ZQaI GdGJgGe (B/ s - (3YHO GdHGbj, YOdj, s ((3GdbGgQI (B[(3eUQ(B] : s (3GdeWHYI GdYGdjI (B951.s, 1951)
(3jJVef GQLGYGJ HHdjhLQGajI(B.s
Keywords: (3bGfhf GdGLQGAGJ GdLfGFjIs -- (3eUQ(B.s; (3GdbGfhf GdLfGFjs -- (3eUQ(B.s