(3GdMbhb GdYjfjI GdGUdjI(B. s (3GdcJGH GdGhd, s (3Mb GdedcjI (B/ s - (3GdTQbGhj, Lejd, s ([(3GdbGgQI, eUQ(B] : s (3OGQ GdfgVI GdYQHjI, s, 1981)
(3jJVef EQLGYGJ HHdjhLQGajI(B.s
Keywords: (3GdedcjIs -- (3bhGfjf hJTQjYGJs -- (3eUQ(B.s; (3GdMbhb GdYjfjI GdGUdjIs -- (3bhGfjf hJTQjYGJs -- (3eUQ(B.s