Today, they are the largest single source of historical material about visual art in the country.

By 1960, power stations had become the largest single source.

And for many states, the largest source of revenue is income tax.

It is generally a large source of employment for women.

But there are now other large sources of potential assistance.

This could be a potentially large new source of energy.

They gave close to $270 million between 1977-1981 and were Sudan's largest source of foreign aid by 1984.

Since today the largest source of economy is the coffee.

I remember a large source of energy completely taking over my body during the fall.

But the largest source of help so far has been private charity.