(3TQM bGfhf GdYbhHGJ (B:s (3GdbSe GdNGU (B: (3GdLQGFe GdeNdI HGdEOGQI GdYGeI, GdLQGFe GdeNdI HGdKbI GdYGeI, GdLQGFe GdLeQcjI (B/ s - (3YKeGf, BeGd YHO GdQMje s ((3GdbGgQI (B: s (3eWGHY GdgjFI GdeUQjI GdYGeI ddcJGH, s, 1989)
(3jTJed Ydi EQLGYGJ HHdjhLQGajI(B. s
Keywords: (3bGfhf GdYbhHGJ s -- (3eUQ s; (3GdLeGQcs -- (3bhGfjf hJTQjYGJs -- (3eUQ s; (3GdbGfhf GdEOGQjs -- (3eUQ s