(3GdYdGbGJ GdGbJUGOjI GdOhdjI(B. s (3GdcJGH GdGhd, s (3aj fXQjI GdJNUU GdOhdj, fXQjI GdeOahYGJ GdOhdjI (B/ s - (3GdZfOhQ, GMeO, s ((3GdbGgQI (B[(3eUQ(B] : s (3OGQ GdfgVI GdYQHjI (B969.s, 1969)
(3jJVef GQLGYGJ HHdjhLQGajI(B.s
Keywords: (3GdYdGbGJ GdGbJUGOjI GdOhdjI(B.s; (3GdGbJUGO GdOhdj(B.s; (3GdefXeGJ GdOhdjI(B.s