On the formation of definitive figures by the deposition of dust.

We will never have a true, definitive figure," he says.

Occupational health experts agree that such ailments are on the rise in other industries, although they do not have definitive figures.

There are no definitive figures on success rates, in part because there is no one standard treatment to judge.

While no one would put a definitive figure on the value of the artist's own collection, estimates range from $50 million to $150 million.

The magazine also reports that additional survivors were rescued over the next few days, but does not give a definitive figure.

But with much of the country still unseen by the authorities, it was impossible to settle on a definitive figure.

No definitive figures exist for the number of town houses in the city.

No definitive figures about population distribution are available, since the last census was taken in 1932.

One author gives a figure of up to 12,000 grouped in 700 bands during the 1945-55 decade, but definitive figures are unavailable.