(3fXQjI GdKef (B/ s - (3GdfLGQ, SYjO, s ((3GdbGgQI (B[(3eUQ(B] : s (3ecJHI GdfgVI GdYQHjI (B959.s, 1959)
(3jJVef GQLGYGJ HHdjhLQGajI (B: (3UaMI (B241-242.s
Keywords: (3GdbjeI (B((3fXQjI(B)s; (3GdGbJUGO GdLRFj(B.s; (3GdGSYGQ(B.s